Zenith and J.N. Shapiro, G.F.J. Calibre 135 Double Signed

Zenith has partnered with J.N. Shapiro, the independent American dial maker based in California, for the G.F.J. Calibre 135 Double Signed: the second edition in a collaboration programme that joins Swiss technical mastery with American independent craftsmanship. The pairing is increasingly rare in modern horology, a genuine conversation between two distinct traditions, each bringing its own vocabulary to a single piece.

The watch arrives as a 25-piece limited edition in 18k rose gold, its dial entirely hand finished at Shapiro’s California atelier. Three distinct guillochéed patterns distinguish it: barleycorn and basketweave, classical finishing techniques that have endured for centuries, alongside Shapiro’s own signature Infinity Weave. Applied 18k rose gold elements frame these patterns. Both names appear on the dial itself: ZENITH | J.N. SHAPIRO, a visual assertion that neither house subsumes the other. The damascening applied to the Calibre 135 bridges draws directly from the vocabulary of historic American pocket watch making, a tradition that shaped watchmaking practice on both continents during the nineteenth and early twentieth centuries. Each damascened bridge is hand finished rather than produced through mass methods.

The Calibre 135 has been a cornerstone of Zenith’s identity since the 1960s, celebrated for its chronometric reliability and its 50-hour power reserve. Placing this mechanism beneath a dial conceived and executed by Shapiro reflects a deliberate choice: to work with makers whose skill and sensibility complement rather than replicate your own. J.N. Shapiro’s reputation in horology rests on hand guillochéed finishing executed without shortcuts. Each of the 25 dials receives the full sequence of his atelier’s process: the patterns are cut by hand, the applied gold elements fitted and finished individually, and every piece checked against standards Shapiro has maintained since establishing his independent practice.

The case measures 42mm in diameter, water resistant to 100 metres, and finished in 18k rose gold with a polished and brushed execution that complements the dial without competing with it. A display caseback permits examination of the damascened bridges and the Calibre 135 mechanism beneath. The watch arrives on a hand stitched leather strap, finished by Shapiro’s atelier as part of the complete package. The G.F.J. Calibre 135 Double Signed is available through authorised Zenith retailers; as a 25-piece limited edition, enquire directly for current availability and pricing.

The two houses have worked together before. This second collaboration deepens their relationship by introducing techniques that sit at the heart of each maker’s identity. Zenith’s role is the movement and the decision to limit the edition; Shapiro’s is the hand finishing that marks every surface. Both commitment and constraint define the piece: a limited run of 25 in 18k gold, each dial worked by hand, each damascened bridge finished individually. This is what contemporary watchmaking becomes when technical mastery and independent craft come into genuine dialogue.

The two houses have worked together before. This second collaboration builds on their first, deepening the relationship by introducing techniques that sit at the heart of each maker’s identity. Zenith brings the Calibre 135, a movement that has earned recognition for its 50-hour power reserve and its integration into the house’s sports chronographs and dress watches alike. Shapiro brings the discipline of hand finishing, a practice that has become rarer in watchmaking as commercial pressures shift the balance toward efficiency. Together, they propose that both precision and artisanal skill belong in a single watch.

The case measures 42mm in diameter, water resistant to 100 metres, and finished in 18k rose gold with a polished and brushed execution that complements the dial without competing with it. A display caseback permits examination of the damascened bridges and the Calibre 135 mechanism beneath. The watch arrives on a hand stitched leather strap, finished by Shapiro’s atelier as part of the complete package.

The G.F.J. Calibre 135 Double Signed with J.N. Shapiro is available through authorised Zenith retailers. As a 25-piece limited edition, the house manages availability directly. The price and exact delivery timeline should be confirmed with your retailer, as with all limited edition releases from Zenith.

J.N. Shapiro, the California based dial maker, established his independent practice with a commitment to hand finishing techniques that have largely disappeared from contemporary watchmaking. His reputation rests on the execution of guillochéed dials without compromise, each pattern cut by hand and every applied element fitted individually. The atelier’s approach reflects a philosophy shared across both coasts: that mechanical watchmaking demands the presence of skilled hands at every stage, not merely at the design conception. This second collaboration with Zenith deepens a relationship begun with their first Double Signed piece, each edition moving the conversation between the two makers into fresh technical territory.

The Calibre 135 itself carries the weight of Zenith’s own lineage. Introduced in the 1960s, the movement became instrumental in establishing the house’s reputation for chronometric precision, a reputation that extended through decades of use in both sports chronographs and refined dress watches. Its 50-hour power reserve and robust construction made it a cornerstone of Zenith’s identity during a period when Swiss watchmaking was refining its technical standards. To pair this celebrated mechanism with Shapiro’s hand finishing is to propose that a movement of recognised excellence gains rather than loses from the presence of a master craftsperson’s attention to the surfaces that frame it.

The damascening applied to the Calibre 135 bridges within this edition draws directly from the vocabulary of historic American pocket watch making, a tradition that shaped watchmaking practice on both continents during the nineteenth and early twentieth centuries. By introducing this technique into a contemporary Swiss movement, the collaboration acknowledges that precision and artisanal practice speak the same language across geography and time. The decision to hand finish these bridges rather than apply them through production methods signals that both Zenith and Shapiro regard this 25-piece edition not as a commercial object but as a statement about what contemporary watchmaking can be when technical mastery and independent craft come into genuine dialogue.

Imagery courtesy of Zenith (@zenithwatches).