Zenith G.F.J. Tantalum: Calibre 135 Goes Rare-Metal — 20 Pieces for W&W 2026

Description

Zenith's G.F.J. line — named for the Manufacture's founder, Georges Favre-Jacot, who opened the Le Locle workshop in 1865 — was created to bring the legendary Calibre 135 back into a modern wristwatch. The 135 is one of the most decorated movements in horology: Neuchâtel Observatory chronometry competition winner multiple times between 1950 and 1954, and an almost mythic object among vintage-movement collectors. The original G.F.J. launched in 2023 in steel and gold. For Watches & Wonders 2026, Zenith takes the line to its logical conclusion: a 39.5mm tantalum case, a black-onyx dial, a grey mother-of-pearl small-seconds register, eleven baguette-cut diamond hour markers, and a production run of just 20 pieces.

Tantalum is rare in watchmaking for good reason — it is dense, brittle and notoriously difficult to machine, with a soft blue-grey colour and a satin glow that sits somewhere between titanium and platinum. Audemars Piguet used it briefly in the 1990s (Royal Oak Tantalum); F.P. Journe has put it on a handful of pieces; Hublot dabbled. A 20-piece Zenith G.F.J. Tantalum is a serious collector proposition.

CHF 73,900. Not cheap — but it is fractional-cost compared to comparable historical-movement limited editions from the Big Three Genevan houses.

Design

The G.F.J. case geometry remains: a 39.5mm round case with a subtle tonneau undercut, mixed polished and satin surfaces, and Zenith's signature "brick-pattern" guilloché inspired by the façade of the Le Locle Manufacture — here reproduced in three-dimensional relief on the outer dial ring. The tantalum execution gives the piece a distinctive cold blue-grey tone that shifts with light — more technical than platinum, warmer than titanium.

The dial is a three-part composition: a polished black onyx centre (mirror-finished), a grey mother-of-pearl small-seconds sub-dial (oversized, positioned at 6 o'clock, referencing the 135's original architecture), and the brick-pattern outer ring. Eleven baguette-cut diamonds serve as hour markers — the 12 o'clock position left open for the Zenith logo — keeping the colour palette quietly monochromatic. Leaf hands finish the presentation.

Specifications

Reference: G.F.J. Tantalum (20-piece limited edition)
Case size & material: 39.5mm, tantalum
Bezel: Stepped, polished tantalum
Crystal: Sapphire, double-domed with AR coating
Dial: Three-part — black onyx centre, grey mother-of-pearl small-seconds, brick-pattern guilloché outer ring; eleven baguette-cut diamond hour markers
Movement: Calibre 135 (in-house, manually wound)
Frequency: 18,000 vph (2.5 Hz) — historical-specification escapement
Power reserve: 72 hours
Certification: Chronometer-grade (historical 135 specification)
Water resistance: 50m
Limited edition: 20 pieces worldwide
Price: CHF 73,900 / ~USD 83,400

What's Exciting

This is a historically literate collector's watch dressed in contemporary clothes. The Calibre 135 is not a reissue in the Omega 321 or Zenith El Primero sense — it is a modernised direct continuation of the movement that won the Neuchâtel Observatory competition in 1950, 1951, 1952, 1953 and 1954. Having it inside a tantalum case with a black onyx dial, mother-of-pearl sub-dial and baguette diamond hour markers — in just 20 pieces — makes this one of the most serious vintage-modern bridges at W&W 2026.

Tantalum itself is a collector magnet. AP Royal Oak Tantalums trade for heavy multiples of their original retail today. Zenith applying it to its rarest movement, at a production run small enough to disappear, signals that the G.F.J. is being positioned as Zenith's true top-of-the-pyramid line — no longer a sub-line of the El Primero story, but a haute-horlogerie statement of its own.

History

Zenith was founded by Georges Favre-Jacot in Le Locle in 1865 as one of the first vertically integrated manufactures in Switzerland. The Calibre 135 entered production in 1949 and promptly swept the Neuchâtel chronometry competition, earning observatory prizes year after year. It was revered by collectors long before Zenith officially revived it inside the G.F.J. in 2023. The 2026 Tantalum is the third and rarest G.F.J. execution, positioning the line at the summit of Zenith's modern catalogue.

Given Zenith's production output and the microscopic 20-piece allocation, this reference is expected to be allocation-gated for top-tier clients and appears unlikely to reach public display cabinets — classic collector-targeted W&W strategy.