Once nicknamed with a touch of malice “the poor man’s watch” by certain connoisseurs, the Tank Must occupies a singular place in the history of the Parisian maison. Worn over the decades by legendary figures such as Catherine Deneuve, Charlotte Rampling, Andy Warhol or Patti Smith, this iconic creation of the 1970s has become a true benchmark. Offered at its launch for around 150 dollars, it now changes hands on the pre-owned market at prices exceeding 3,000 euros, illustrating a spectacular appreciation over five decades.
At the origins of the 1917 original design
To understand the exceptional destiny of this model, one must go back to the creation of the original Tank. Designed in 1917 by Louis Cartier, this revolutionary piece drew direct inspiration from the geometric lines of the first armoured vehicles seen on the front lines. With its rectangular case, vertical brancards, Roman numeral dial and sword-shaped hands, the watch immediately laid the foundations of a timeless style.
The bold response to the watch crisis
At the beginning of the 1970s, traditional watchmaking went through a major storm. Monetary instability and the first oil crisis slowed global consumption, whilst the emergence of Japanese quartz movements disrupted the sector. More precise and significantly cheaper to produce, these Asian innovations seduced a vast clientele and challenged the greatest Swiss and French maisons.
In order to navigate this complex period without compromising its values, the Parisian maison conceived the line named Les Must in 1977. The founding idea was to make the elegance of Rue de la Paix accessible to a new audience. Whilst preserving the iconic 1917 design, this bold project offered a modern and more affordable reinterpretation of watchmaking luxury.
The art of vermeil and the collectors’ signature
The secret behind this attractive positioning rested on an innovative choice of materials. Instead of the usual solid gold, the case was crafted in vermeil, an alloy of 925 silver coated with a 20-micron gold plating. Several details allow collectors today to recognize these period models, notably the Must de Cartier inscription on the dial as well as the specific engravings affixed to the back of the case.
Long overlooked by the most purist collectors, these 1970s and 1980s pieces are now enjoying unprecedented enthusiasm. The Tank Must asserts itself more than ever as the ideal gateway into the world of vintage luxury, combining historical heritage, authenticity and timeless elegance with panache.

