GMT Balancier Convexe

• Limited Edition: limited edition
• Case: Titanium and synthetic sapphire crystal • Three-dimensional, variable geometry bezel with raised engraved text • Synthetic sapphire crystal over the entire periphery of the caseband • Three-dimensional, variable geometry lugs, hand-polished with handfinished straight graining • Transparent back with synthetic sapphire crystal • Titanium security screws • Raised engraving “Architecture 1” and “Greubel Forsey"
• Size: 42.9 mm x 15.10 mm
• Movement: Synthetic sapphire disc displaying city names surrounded by 2 rings (UTC and summer time) engraved and lacquered, hand matt lapped • Gold “summer time” plate with limitation number, raised engraving, hand matt lapped
• Function: Hours and minutes • Small seconds • 2nd time zone GMT • Rotating globe with universal time • Day-and-night • 24 time zones universal time • Summer time, winter time
• Power Reserve: approximately 72 hr
• Water Resistance: 50 m
• Dial: Terrestrial globe in titanium, relief-engraved continents, ocean blue treatment • Day-and-night UTC indicator in titanium, engraved and lacquered • GMT indicator in gold • Amphitheatre hour-ring with engraved and lacquered minute-circle • Small seconds indicator in gold
• Caseback: sapphire crystal
• Hands: Hours and minutes, red triangles with Super-LumiNova • 2nd time zone GMT indicator, red triangle • Small seconds in polished blued steel, flat black polished head
• Strap/Bracelet: Hand-sewn textured rubber or rubber with text in relief, titanium folding clasp, engraved GF logo --- On demand: 3-row metal bracelet in titanium, folding clasp with integrated fine adjustment, engraved GF logo

A more compact case. An integrated power reserve. The complete expression of the GMT complication.

At the center of the dial sits a miniature terrestrial globe, rotating in real time over 24 hours. It sits flush with the sapphire crystal, surrounded by concentric layers of indication: local time, universal time, a second time zone, and a day/night distinction. The architecture is built around this rotating earth — not decorative, but functional at every level.

The 30° inclined balance wheel is suspended beneath a flat black-polished steel bridge, flanked by a small seconds display. The newly integrated 72-hour power reserve is positioned without disrupting the compositional balance of the dial.

The movement is housed in the Convexe titanium case at 42.9 mm — reduced from the previous version for improved wearability while preserving the architectural profile that defines the line. The domed sapphire crystal and three-dimensional bezel maintain the sculptural character. Available on a titanium bracelet or hand-sewn rubber strap.

GMT, second time zone, rotating globe with universal and day/night time, world time across 24 time zones, summer/winter time indication, cities observing daylight saving time, GMT pusher, 30˚ inclined Greubel Forsey balance wheel system, hours and minutes, small seconds, 72-hour power reserve.