The Must de Cartier Tank Vermeil (Reference 681008) is an iconic, highly sought-after vintage dress timepiece originally introduced in the late 20th century. This specific configuration stands out for its bold, minimalist aesthetic and distinct precious metal composition.

• Case Material: Vermeil construction consisting of solid .925 sterling silver coated with a thick layer of 18K yellow gold plating (typically 20 microns).

• Dimensions: Known as the Large Model (LM), measuring 23mm in width (excluding crown) by 31mm lug-to-lug, featuring a ultra-slim thickness of roughly 6mm. 

• The Black Dial: Often executed in a deep black lacquer or onyx finish. It usually displays minimal layout options—either completely plain (stating only "must de Cartier" in gold script) or accented with gold Roman numerals or a subtle minute track. 

• Movement: Powered by the reliable Cartier Caliber 81 Quartz movement. 

• Signature Features: Includes the traditional blue sapphire cabochon crown and gold sword-shaped hands.