Zenith's second entry in its Double Signed program pairs the G.F.J. Calibre 135 with California independent watchmaker Joshua Shapiro of J.N. Shapiro. The 39.15mm rose gold watch features a silver dial hand-engine-turned in Shapiro's California atelier, with three guilloché patterns, and damaskeened movement bridges, extending the collaboration beyond the dial. The edition is limited to 25 numbered pieces priced at CHF 68,900.
- Limited to 25 individually numbered pieces
- Priced at CHF 68,900
- Dial hand-engine-turned in J.N. Shapiro's California workshop
- Three guilloché patterns: barleycorn, basketweave, and Infinity Weave in the small seconds subdial
- Movement bridges finished with American-style damaskeening, a change from the earlier Naoya Hida edition, which focused on the dial
- COSC-certified manually wound Calibre 135 with 72-hour power reserve
- Three straps supplied: brown Cordovan, beige nubuck alligator, and black calf leather, with an 18k rose gold bracelet available on request
The dial's three guilloché patterns sit within contrasting rose gold rings, with applied hour markers and branded plaques tying the rose gold and silver together.
The movement runs at 2.5 Hz with a Breguet overcoil on the variable-inertia balance wheel and hacking seconds.
Damaskeening on the Calibre 135 bridges pays tribute to decoration traditionally found in American watchmaking.
Hodinkee notes the dial's three guilloché zones are barleycorn on the outer periphery, basketweave in the center, and Shapiro's Infinity Weave in the small seconds subdial, all separated by contrasting rose gold rings.
Hodinkee's view is that the damaskeening complements the Cal. 135's architecture and adds texture around the oversized balance wheel.