# Zenith G.F.J. Calibre 135 Double-Signed Watch Launch

> Zenith's new G.F.J. Calibre 135 watch, double-signed by Japanese and American watchmakers, hits collectors' markets.
- Title: Zenith G.F.J. Calibre 135 Double-Signed Watch Launch
- Summary: Zenith's new G.F.J. Calibre 135 watch, double-signed by Japanese and American watchmakers, hits collectors' markets. Zenith's G.F.J.
- Keywords: zenith, g.f.j., calibre 135, double signed, naoya hida, joshua shapiro, watch collectors, Robb Report
- Source: Robb Report — https://robbreport.com/style/watch-collector/zenith-jn-shapiro-gfj-calibre-135-double-signed-1238837306
- Author: Rachel Cormack
- Published: 2026-11-12T22:00:00+00:00
- Read time: 1 min
- Topics: zenith, g.f.j., calibre 135, double signed, naoya hida, joshua shapiro, watch collectors
## Zenith G.F.J. Calibre 135
Zenith launched the G.F.J. Calibre 135 in 2025, named after founder Georges Favre-Jacot, for watch collectors.
## Double Signed Program
The Double Signed program invites indie watchmakers to collaborate on the G.F.J. Calibre 135.
## Naoya Hida and Joshua Shapiro Collaborations
Naoya Hida added minimalist elegance to the G.F.J. Calibre 135 in June 2026, while Joshua Shapiro infused his design DNA.
## Key takeaway

Zenith's G.F.J. Calibre 135 watch, double-signed by Naoya Hida and Joshua Shapiro, appeals to collectors with minimalist design and precious materials.