The Titanium Field Guide

Zenith G.F.J. Calibre 135 Tantalum

98.1865.0135/21.C212

The Zenith G.F.J. Calibre 135 Tantalum is a current-production dress watch with a tantalum case. It is priced well above the $542 median for the category. The caseback is open, so the movement is visible.

All Zenith watchesExotic-material dress watchesUnder 11 mm thickDisplay back
Price
$83,400
Material
Tantalum
Grade / type
Tantalum
Water resistance
30 m
Reference
98.1865.0135/21.C212
Type
Dress
Case diameter
39.0 mm
Thickness
10.5 mm
Origin
Switzerland
Movement
Manual, COSC
Caliber
Calibre 135
Power reserve
72 hours
Complications
Time only
Colour
Grey
Construction
Assembled
Finish technology
Natural finish
Caseback
Sapphire
Nickel-free
Unconfirmed (bracelet, strap, or clasp hardware not confirmed)
Bracelet / strap
Leather strap
Crystal
Sapphire
Display back
Yes
Dial
Onyx
Dial colours
Black
Availability
Offered
Status
Current (limited edition of 161)
Not published
Lug-to-lug, Weight, Hardness, Surface treatment, Matching bracelet, Lume
Medium confidence Verified Jul 2026 Source: Watch Collecting Lifestyle Maker ↗
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Zenith G.F.J. Calibre 135 Tantalum?

The Zenith G.F.J. Calibre 135 Tantalum has a tantalum case with a sapphire caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Zenith G.F.J. Calibre 135 Tantalum?

It is 39.0 mm in diameter, 10.5 mm thick, and water resistant to 30 m.

How much does the Zenith G.F.J. Calibre 135 Tantalum cost, and is it available?

It is current-production and lists from $83,400.

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