Zenith, G.F.J. – Caliber 135 Continues to Spin the Legend

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Zenith has announced a limited edition "G.F.J." featuring the legendary Caliber 135. Characterized by a yellow gold case and a bloodstone dial, it revives the tradition of high-precision watchmaking in a contemporary manner. This is a new development for the model that won the 2025 GPHG Chronometry Prize.

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Zenith has announced a limited edition "G.F.J." featuring the legendary Caliber 135. Characterized by a yellow gold case and a bloodstone dial, it revives the tradition of high-precision watchmaking in a contemporary manner. This is a new development for the model that won the 2025 GPHG Chronometry Prize.

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Source: https://prtimes.jp/main/html/rd/p/000000096.000051670.html | Date: Date unavailable

LE LOCLE / GENEVA, April 14, 2026: Zenith writes a new chapter in its highly acclaimed "G.F.J." collection, which revives a legendary caliber and pursues the essence of chronometry. Named after the initials of Zenith's founder, Georges Favre-Jacot, the "G.F.J." is not merely a re-edition but signifies a return to the origins of high-precision watchmaking. The "G.F.J.", which breathed new life into the legendary Caliber 135 and won the Chronometry Prize at the 2025 Geneva Watch Grand Prix (GPHG), is a contemporary expression of Zenith's historical expertise in observatory timing. And now, Zenith has created a yellow gold "G.F.J." with a striking bloodstone dial, limited to 161 pieces. This timepiece goes beyond the adoption of new materials, reaffirming the "G.F.J." as a central contemporary presence for Caliber 135, which continues to weave its story. Zenith built its reputation by participating in observatory chronometry competitions from the late 19th century, winning 2,333 awards, surpassing other watch brands. At the heart of this golden age was Caliber 135. Caliber 135 was specially developed for chronometry competitions and manufactured from 1949 to 1962. The competition version, 135-O, won 235 chronometry prizes and achieved five consecutive first places at the Neuchâtel Observatory from 1950 to 1954. This record remains unbroken. Zenith's goal was not to reproduce the past but to redesign Caliber 135 for the 21st century. The new caliber maintains its distinctive architecture with a diameter of 13 lignes (30mm), a frequency of 18,000 vibrations per hour, and a large balance wheel with an offset center wheel, while incorporating modern materials and technological innovations to improve performance and reliability. Caliber 135 The barrel provides approximately 72 hours of power reserve, and the optimized gear train enhances efficiency. The large balance wheel features a regulating screw and a Breguet overcoil. The iconic double-arrow shaped regulating mechanis

Zenith, G.F.J. – Caliber 135 Continues to Spin the Legend

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