Introduced in 2026, the Zenith G.F.J. Calibre 135 30.1865.0135/56.C216 is a limited edition watch, with only 161 pieces crafted in 18-carat yellow gold, representing a modern iteration of the G.F.J. line with its revamped Calibre 135. This timepiece features a manually wound chronometer movement paired with a uniquely designed three-part dial consisting of an outer ring with a brick-pattern guilloché finish, a center made from jasper bloodstone, and a small-seconds register constructed from mother-of-pearl. The case, fashioned from 18-carat yellow gold, measures 39.15mm across and 10.5mm in thickness, with a lug-to-lug measurement of 45.75mm, showcasing a stepped bezel and curved lugs. The watch is protected by a domed sapphire crystal treated for anti-reflectivity on both sides and boasts a transparent sapphire caseback, allowing it to maintain a water resistance of 5 ATM.

The intricate dial has three distinct sections: the outer frame exhibits Zenith's iconic brick guilloché, the central part is carved from natural jasper bloodstone, and at 6 o'clock, the sizable small-seconds counter stands out in elegant mother-of-pearl. Yellow gold hour markers take the form of applied indices and dots, complemented by finely faceted yellow gold hands. As a natural stone, each bloodstone center presents unique variations in coloring and patterns. At its heart lies the manually wound Calibre 135, which features 22 jewels, operates at a rate of 18,000 vibrations per hour (2.5Hz), and has a 72-hour power reserve. This movement offers central hours and minutes, a small-seconds display at 6 o'clock, and includes a stop-seconds function. With its COSC certification, the calibre showcases refined finishing techniques, including Côtes de Genève and a ruthenium coating.

Maintaining the classic 30mm calibre format, it features an oversized balance and regulation screws, as well as a Breguet overcoil and the distinctive double arrow-shaped regulator characteristic of this contemporary reworking of the historic movement. The set comes with three interchangeable straps: a beige nubuck alligator strap, a green alligator strap, and a classic black calfskin strap, each equipped with a yellow gold pin buckle. Additionally, an 18-carat yellow gold bracelet with a double folding clasp is offered separately.