Charlie Paris Concordia GMT Latitude Zéro: owner reviews and feedback

The Charlie Paris Concordia GMT Latitude Zéro, also introduced as Latitude 0°, is one of the most distinctive versions of the first-generation Concordia GMT released in 2023. It combines the specifications of a genuine 300-metre dive watch with a GMT complication for tracking a second time zone, all within a 40 mm stainless-steel case and around a smoked green dial whose textured surface evokes tree bark and the lush vegetation associated with equatorial regions.

This edition now occupies a particularly interesting place within the history of Charlie Paris because it belongs to a generation of Concordia GMT watches that is technically very different from the models currently offered by the company. Its Swiss Soprod C125 calibre, two-tone 24-hour flange, sapphire display back and production limited to only 50 pieces give it a clearly defined identity within a collection originally built around adventure and robustness.

What are the characteristics of the Charlie Paris Concordia GMT Latitude Zéro?

The Concordia GMT Latitude Zéro uses a 316L stainless-steel case measuring 40 mm in diameter, 47.5 mm from lug to lug and 12.5 mm thick. A 20 mm lug width preserves conventional proportions and makes strap changes straightforward, while the overall dimensions allow the watch to combine substantial water resistance with reasonable everyday wrist presence.

Those proportions are particularly appealing for a watch incorporating a dive bezel, GMT display, exhibition back and 300-metre rating. The Concordia avoids the substantial thickness sometimes associated with sports GMTs and remains versatile enough to move easily from outdoor use to everyday wear.

A case combining polished and brushed surfaces

Charlie Paris uses several finishing techniques across the case to prevent the watch from appearing like a purely utilitarian block of steel. Predominantly brushed surfaces reinforce its tool-watch character, while selected polished areas catch more light and add a slightly more elegant dimension.

This combination helps explain the visual versatility of the Concordia GMT. It possesses the functional specifications of a watch designed for adventure, yet its exterior is sufficiently refined to avoid looking exclusively intended for diving or sporting activities.

A dive bezel retained despite the GMT complication

One of Charlie Paris's most important decisions was to retain a genuine unidirectional 60-minute dive bezel. Many watches combining diving and GMT functions replace the elapsed-time bezel with a 24-hour scale, effectively prioritising travel functionality at the expense of traditional diving timing.

The Concordia GMT instead preserves its diving identity and moves the 24-hour scale inside the dial. Its 120-click unidirectional bezel uses an aluminium insert and a luminous marker at 12 o'clock, allowing elapsed time to be measured independently of the second-time-zone display.

A genuine 300-metre diver

The Concordia GMT Latitude Zéro is rated to 300 metres, or 30 ATM, and Charlie Paris presented the model as compliant with the requirements of the ISO 6425 diving-watch standard. It includes a screw-down crown, screwed caseback, unidirectional bezel and substantial luminous treatment intended to preserve legibility in darkness.

These specifications clearly differentiate it from a GMT merely styled to resemble a dive watch. Adding the travel function did not cause Charlie Paris to abandon the fundamental capabilities of the original Concordia, whose robustness had always been central to the collection.

A 3 mm domed sapphire crystal

The dial is protected by a slightly domed sapphire crystal approximately 3 mm thick and treated to reduce reflections. The construction contributes to overall durability while adding visual depth, particularly when the GMT flange is viewed from an angle.

Sapphire is a logical choice for a watch intended to face demanding environments. Its resistance to scratching helps maintain long-term legibility, while anti-reflective treatment makes the display easier to read under widely varying lighting conditions.

A completely redesigned crown for the GMT

The first Concordia GMT introduced a redesigned crown accompanied by crown guards, representing an important change from the previous three-hand Concordia. Its more rounded shape and widely spaced grooves improve grip, which becomes especially useful when independently adjusting time, date and GMT indications.

The crown retains a decorative motif recalling a ship's wheel, already associated with the Concordia identity. The new geometry therefore improves ergonomics without abandoning the visual continuity of the collection.

The red crown safety indicator

A red ring becomes visible at the base of the crown whenever it is unscrewed. It acts as a visual warning that the watch is no longer in its normal sealed configuration and reminds the owner to screw the crown back down before exposure to water.

This simple solution reflects the functional approach of the Concordia GMT. It is not a mechanical complication, but it addresses a genuine risk on a dive watch whose crown may be manipulated more frequently because of the additional time-zone function.

The smoked green “bark” dial of Latitude Zéro

The defining feature of the Latitude Zéro is its smoked green dial with an irregular texture reminiscent of tree bark. It immediately distinguishes the watch from the more conventional Blue and Black Concordia GMT executions and from the brown-toned Dune model.

The texture creates changing areas of light and shadow, giving the green substantially more depth than a uniformly lacquered surface. Depending on angle and illumination, the dial can appear emerald, forest green or considerably darker, strengthening the visual association with equatorial vegetation suggested by the Latitude Zéro name.

Why the name Latitude Zéro?

Latitude zero is geographically the Equator, and Charlie Paris uses that reference to support the green, vegetal identity of this version. The smoked colour, bark-like surface and beige accents create an atmosphere very different from the Antarctic Blue Concordia connected with the polar origins of the collection.

The contrast gives the Concordia family an almost geographical narrative. A watch originally created for Antarctic conditions becomes a GMT whose appearance evokes equatorial regions, an especially appropriate idea for a complication fundamentally associated with travel.

Large applied luminous markers

The applied hour markers are generously filled with Super-LumiNova, with predominantly circular plots complemented by more rectangular forms at 3 and 9 o'clock. Their cream tone on Latitude Zéro adds a subtle neo-vintage character while creating effective contrast against the deep green dial.

The main hands also carry substantial luminous material. The Concordia consequently retains rapid hour-and-minute readability despite simultaneously accommodating a date display, fourth GMT hand and 24-hour scale.

A green-and-cream 24-hour GMT flange

The GMT function is read against a wide fixed flange numbered from 1 to 24 and divided into two colour zones. On Latitude Zéro, Charlie Paris combines green with a lighter cream tone to help differentiate daytime and nighttime hours in the reference time zone.

This arrangement is one of the strongest functional ideas of the first Concordia GMT. By positioning the 24-hour scale around the dial rather than on the external bezel, Charlie Paris preserves both travel-time information and a proper elapsed-time diving bezel.

A visually discreet GMT display

The GMT hand completes one revolution every 24 hours and ends in a triangular arrow used to read the second time zone from the flange. On Latitude Zéro, much of the hand is visually close to the colour of the green dial, deliberately reducing its presence when the owner simply wants to read local time.

The arrow remains sufficiently visible whenever GMT information is required. This visual hierarchy avoids one of the common disadvantages of four-hand GMT watches, in which the additional hand can permanently clutter the dial despite being needed only occasionally.

GMT information remains visible in darkness

Charlie Paris uses different luminous signatures to distinguish primary time from GMT information. The GMT arrow and relevant 24-hour markings include a blue-toned glow that separates them from the main hour indications.

The travel function therefore does not completely disappear in darkness. This is particularly coherent on a travel-and-dive watch whose information may need to remain understandable in much poorer lighting conditions than an ordinary urban environment.

Date window at 6 o'clock

The Concordia GMT retains a date aperture positioned at 6 o'clock. This preserves vertical symmetry and avoids disturbing the more prominent hour markers at 3 and 9.

The date also strengthens the watch's credentials as a practical travel companion. Hours, minutes, seconds, date and a second time zone provide the information most useful during travel without adding more decorative complications.

The Swiss Soprod C125 calibre

The Concordia GMT Latitude Zéro is powered by the Swiss-made Soprod C125 automatic mechanical movement. It is developed from Soprod's M100, also known as the A10-2 architecture, with an additional GMT mechanism allowing a fourth central hand to complete one revolution every 24 hours.

This movement is now one of the easiest ways to distinguish the first Concordia GMT generation from the watches sold by Charlie Paris today. The company has since adopted a Japanese Seiko NH34 architecture for its new GMT collection, whereas the 2023 Latitude Zéro belongs firmly to the period of Swiss Soprod-powered automatic Concordias.

A caller or office GMT

The Soprod C125 is a caller-style, or office GMT, movement rather than a traveller GMT with an independently jumping local-hour hand. During adjustment, it is the 24-hour GMT hand that can be moved separately while the main local-hour hand remains connected to the conventional time-setting train.

This architecture is especially useful for someone who stays in one primary time zone but wants to track a colleague, office or destination abroad. A frequent traveller changing local zones must instead reset local time conventionally, unlike traveller GMT calibres where the local hour can jump independently in one-hour increments.

25 jewels and a 4 Hz frequency

The Soprod C125 uses 25 jewels and operates at 28,800 vibrations per hour, or 4 Hz. This widely used contemporary Swiss frequency provides a proven compromise between rate stability, resistance to disturbances and energy consumption.

The movement also incorporates an Incabloc shock-protection system for the balance. That specification fits particularly well within a collection historically associated with exploration and conditions more demanding than those normally expected of a traditional dress watch.

40 hours of power reserve at launch

Launch documentation for the Concordia GMT generally specified approximately 40 hours of power reserve. Reviews and technical sheets published in 2023 consistently used that figure, equivalent to somewhat less than two full days of operation from a complete wind.

Charlie Paris's current technical documentation for the C125 now lists 42 hours, representing a minor difference in published specification rather than a fundamental transformation of the movement. For the 2023 Latitude Zéro, 40 hours remains the figure most faithful to the information communicated when the watch was sold.

Accuracy figures that changed in later documentation

At the Concordia GMT's launch, a rate tolerance of roughly -4 to +10 seconds per day was frequently quoted for the C125 installed in the watch. Charlie Paris's current movement documentation instead describes the calibre as regulated to approximately -7 to +7 seconds per day.

These figures should therefore be understood within their publication context rather than interpreted as two separate specifications for Latitude Zéro. In either case, the watch was not marketed as individually COSC-certified, although its Swiss calibre clearly occupied a higher technical position than many entry-level movements used in similarly priced GMT watches.

Bidirectional automatic winding

The C125 uses bidirectional automatic winding and can also be wound manually through the crown. The owner therefore benefits from a movement maintained by wrist motion while retaining the ability to restore power directly after the watch has stopped.

The calibre also provides hacking seconds during time setting and rapid correction of secondary indications. It consequently forms a particularly complete mechanical package for a watch intended to combine travel, diving and everyday use.

An exhibition back unusual on a 300-metre diver

The Concordia GMT uses a screwed caseback incorporating a sapphire window through which the Soprod C125 can be viewed. This is relatively unusual for a 300-metre tool watch, as many dive watches use solid backs to emphasise purely functional character.

Charlie Paris instead chooses to reveal the Swiss mechanics and its personalised oscillating weight. The watch therefore preserves substantial water resistance while adding another horological dimension whenever it is removed from the wrist.

Personalised Charlie Paris oscillating weight

The rotor carries Charlie Paris branding and circular decoration. The remainder of the movement retains the clean industrial finishing expected of the C125 rather than attempting haute horlogerie decoration, an entirely appropriate decision at the price level of the watch.

The display nevertheless allows Latitude Zéro to emphasise the identity of its Swiss movement. This transparent back has become even more interesting historically now that current Concordia GMT models use a different calibre and the Soprod generation represents a clearly defined chapter within the collection.

A Concordia born from Antarctic exploration

The Concordia collection originated with a watch developed in 2018 to accompany French adventurer Matthieu Tordeur during his Antarctic expedition. He travelled approximately 1,150 kilometres alone, unsupported and self-sufficient over 51 days, becoming the first Frenchman and youngest explorer to ski from Hercules Inlet to the South Pole in this manner.

That history explains why the GMT preserves specifications normally associated with genuine tool watches: substantial water resistance, a dive bezel, screw-down crown, night-time legibility and shock protection. Adding GMT in 2023 extended the concept beyond expedition timing and turned Concordia into a travel watch as well.

Diver and GMT rather than one or the other

The technical appeal of the first Concordia GMT comes largely from integrating both uses without sacrificing the fundamental diving function. The 24-hour flange handles reference time while the external bezel remains available for timing a dive or any other elapsed interval.

The two functions can therefore be used simultaneously. This avoids the common solution of turning a dive watch into a GMT simply by replacing its 60-minute bezel with a 24-hour scale and consequently losing part of its original functionality.

Tool-free interchangeable straps

The first Concordia GMT was offered with several 20 mm straps fitted with quick-release spring bars. Charlie Paris provided nylon, leather and three-link steel options, allowing the character of the watch to be changed substantially without specialised tools.

Latitude Zéro works especially well with the beige and brown straps offered at launch because they echo the cream tones of the markers and GMT flange. Steel gives the watch a more versatile urban appearance, while nylon strengthens its expedition-inspired identity.

Distinguishing feature: bark-green dial and an almost hidden GMT hand

The defining characteristic of Latitude Zéro is the combination of its textured green dial with a GMT hand deliberately integrated into that surface. The smoked green finish is not simply a colour change within the collection, because its irregular relief gives the watch depth and makes the edition immediately recognisable.

The subtle 24-hour hand reinforces that personality. Charlie Paris adds useful information without making the dial feel overloaded, allowing the owner to engage with the GMT function when required while preserving a primary display close to the clarity of a conventional dive watch.

Limited to 50 pieces

The Concordia GMT Latitude Zéro was produced in only 50 pieces for its 2023 launch. Dune shared the same limited quantity, while Blue and Black were announced in larger numbers during the initial commercial campaign.

This small production explains why Latitude Zéro quickly became difficult to obtain. By early 2024, specialist publications reviewing other Concordia GMT executions were already noting that the textured green version had sold out.

Seen in the specialist media

Monochrome singled out Latitude Zéro within the original four-model Concordia GMT family and highlighted its smoked green bark-textured dial combined with cream-coloured luminous details. The publication also emphasised the use of the Swiss Soprod C125, independently adjustable caller GMT hand and the preservation of a proper unidirectional dive bezel.

The Time Bum devoted a full review to Latitude 0° and particularly praised the dial, whose relief produces a broad range of shades as light moves across its surface. The review also appreciated the revised crown, subtle GMT hand and preservation of 300-metre water resistance, the stated dive standard and 120-click timing bezel.

Fratello, while reviewing the Concordia GMT Dune, identified Latitude 0° as one of the most distinctive versions in the family and confirmed that it had already sold out by early 2024. More broadly, the publication praised the way Charlie Paris balanced the diving and GMT functions without allowing either one to dominate the visual composition excessively.

What Dialicious owners say

Latitude Zéro owners on Dialicious particularly highlight the originality of the dial, accuracy, comfort and value for money. One owner specifically appreciates the discreet GMT hand because it allows primary time to be read immediately without the fourth hand visually dominating the display.

The combination of diving capability and GMT functionality also appears repeatedly as one of the model's most appealing qualities. Latitude Zéro consequently receives especially positive feedback from its owners, with the textured green surface and versatility frequently mentioned among the reasons for choosing the watch.

Price of the Charlie Paris Concordia GMT Latitude Zéro

During the 2023 pre-order campaign, the Concordia GMT was offered from €1,195 on nylon and €1,245 on the steel bracelet. Announced full retail pricing after the introductory period was €1,375 on leather or nylon and €1,425 on steel.

Those figures apply specifically to the first Soprod C125 generation and should not be compared directly with the prices of current Charlie Paris Concordia GMT watches. The new collection uses a different mechanical architecture and occupies a different position within the range, while Latitude Zéro remains a sold-out historical edition of just 50 pieces.

Now clearly distinct from the current Concordia GMT

The Concordia GMT Latitude Zéro should not be confused with the new Concordia GMT models currently sold by Charlie Paris. Today's generation retains the dive-GMT concept and 300-metre water resistance but now uses a Japanese Seiko NH34 automatic calibre and incorporates several changes in dimensions, colours and pricing strategy.

That evolution makes the historical identity of Latitude Zéro even clearer. Its Swiss-made Soprod C125, bark-textured dial, 50-piece production and significantly different launch positioning make it a representative of a specific period when Charlie Paris sought to move Concordia further upmarket through Swiss mechanics and very limited production.

Conclusion

The Charlie Paris Concordia GMT Latitude Zéro is particularly compelling for collectors seeking a genuine GMT diver without sacrificing either the elapsed-time bezel or straightforward everyday legibility. Its 40 mm steel case, 300-metre water resistance, 24-hour flange, Swiss Soprod C125 calibre and smoked green bark-textured dial give it far more personality than a simple colour variation of the Concordia.

Its limitation to only 50 pieces increases its interest today, but the real strength lies in the coherence of its concept. Latitude Zéro combines travel, diving and neo-vintage aesthetics within restrained dimensions while now representing a clearly identifiable chapter in the history of Charlie Paris before the Concordia GMT moved to a new mechanical generation.

Dialicious owner reviews are a relevant way to choose the watch that truly suits you. They complement the technical specifications of the Concordia GMT Latitude Zéro with the real-world experience of owners who particularly value its dial, comfort, accuracy and discreet GMT display.

(Updated October 2026)