Zenith G.F.J. G.F.J. Calibre 135 Yellow Gold / Jasper Bloodstone

The Zenith G.F.J. Calibre 135 30.1865.0135/56.C216 debuted in 2026 as a limited edition of 161 pieces in 18-carat yellow gold, continuing the G.F.J. line as the contemporary home of the re-engineered Calibre 135. This version combines the manually wound chronometer movement with a three-part dial composed of an outer brick-pattern guilloché ring, a jasper bloodstone centre, and a mother-of-pearl small-seconds register. Its case is executed in 18-carat yellow gold and measures 39.15mm in diameter, 10.5mm in thickness, and 45.75mm lug to lug. The profile includes a stepped bezel and curved stepped lugs, and the watch is fitted with a domed sapphire crystal with anti-reflective treatment on both sides and a transparent sapphire caseback. Water resistance is rated to 5 ATM. The dial follows a three-part construction. The outer ring is decorated with Zenith’s signature brick guilloché, the central disc is cut from jasper bloodstone, and the oversized small-seconds counter at 6 o’clock is executed in mother-of-pearl. The hour markers consist of yellow gold applied indices and dots, paired with faceted yellow gold hands. Because the bloodstone is a natural material, each dial differs slightly in veining and inclusions. Inside is the manually wound Calibre 135, a 22-jewel movement operating at 18,000 vibrations per hour, or 2.5Hz, with a power reserve of 72 hours. It displays central hours and minutes with small seconds at 6 o’clock and includes a stop-seconds mechanism. The movement is COSC-certified and finished with Côtes de Genève and a ruthenium treatment. Its architecture preserves the 30mm calibre format, with an oversized balance, regulation screws, a Breguet overcoil, and the double arrow-shaped regulator associated with this modern re-engineering of the historic calibre. This reference is delivered with three straps: a beige nubuck alligator strap, a green alligator strap, and a black calfskin strap, all fitted with a yellow gold pin buckle. An 18-carat yellow gold bracelet with double folding clasp is available separately.