Cartier Tank Must de Black 'Onyx' Dial Vermeil GM from 1990s

Striking Cartier Tank Must de Vermeil GM from the 1980s, featuring the highly sought-after spider black “onyx” dial—an expressive and characterful variation of Cartier’s timeless rectangular design.

The elegant 23 × 30 mm vermeil case (gold-plated sterling silver) retains the classic Tank proportions, offering a refined yet confident wrist presence. The case shows light, honest wear consistent with age, including a small, discreet area of plating wear on the side of the upper left lug, not visible when worn and restorable if desired.

The standout feature is the original spider black “onyx” dial, displaying a unique organic crackle pattern that gives each piece its own depth and individuality. This example is particularly well preserved, with even lacquer and strong visual contrast.

Powered by the manual-wind Cartier Calibre 78-1, running smoothly and delivering reliable performance in line with its heritage.

Fitted with a handmade Belgian leather strap, carefully selected to complement the watch’s vintage aesthetic, and paired with a classic pin buckle for a clean and understated finish.

Key highlights:
23 × 30 mm vermeil (gold-plated silver) Tank case
Rare spider black “onyx” dial with unique pattern
Cartier Cal. 78-1 manual-wind movement
Gold-tone sword hands
Handmade Belgian leather strap
Classic pin buckle
Light vintage wear with minor, discreet plating loss
Circa 1980s

A distinctive and collectible Cartier, combining iconic design with a rare and visually captivating dial—perfect for those who appreciate individuality within timeless elegance.