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Timeless, sure of itself and of the purity of its design, the Tank watch captures the zeitgeist in 2021. After more than a century, it has been reinvented with the Tank Must. Tank and Must, the fusion of two Maison icons: on one hand, Tank, essential and dandy, and on the other, Must, a name immortalised at Cartier in the 1970s that revisits the classic conventions of luxury.

Cartier Tank Must SolarBeat. Image Credit: Cartier
Cartier Tank Must SolarBeat. Image Credit: Cartier

The Must watches are part of the Maison’s heritage and legend (…). They have withstood the test of time thanks to their instantly recognisable style, but also their excellent craftsmanship, which Cartier applies to all its creations right down to the smallest detail.” Pierre Rainero, Director of Image, Style and Heritage at Cartier.

Tank Must is a chic watchmaking feat worn by many. A Maison signature whose design and movements are continuously evolving, driven by Cartier’s watchmaking commitment to constant progress. The Design Studio has reworked the design of these new Tank Must with monochrome versions and an original version based on a new photovoltaic movement.

Image Credit: Cartier
Image Credit: Cartier

Tank Must – An Ever-Evolving Design 

Taking direct inspiration from the Tank Louis Cartier, the design of the Tank Must has been developed while staying faithful to the historic model. Rounded brancards, revisited dial proportions: finesse is the guiding force behind this new design. A watch that dares to return to great classicism down to the smallest detail, with a precious pearled cabochon winding crown and the return of a traditional ardillon buckle on the leather strap version. A watchmaking classic from the Maison whose sophistication is measured on every level, from its steel strap with curved links, entirely redesigned and interchangeable, to the latest high-efficiency quartz movement – autonomy of around 8 years.

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Cartier Tank Must SolarBeat. Image Credit: Cartier
Cartier Tank Must SolarBeat. Image Credit: Cartier

Pioneering Innovation at Cartier

Since the very beginning, Cartier’s watchmaking ambition has been to constantly strive to improve, relying on technical progress as well as the Maison’s response and commitments to the environment and biodiversity. Pioneering since the invention of the first watch worn on the wrist with the Santos watch (1904), or the one with the folding buckle (1910), Cartier Watchmaking has always been committed to anticipating its clients’ needs. Whether it’s the QuickSwitch patent (2018), which allows straps to be interchanged at home, or the latest photovoltaic dial found on the Tank Must watch, a modern alternative with a quartz movement with no need to change the batteries, the approach is the same; improve the lives, and satisfaction, of Cartier’s clients.

Cartier Tank Must SolarBeat. Image Credit: Cartier
Cartier Tank Must SolarBeat. Image Credit: Cartier

Photovoltaic Dial SolarBeat Movement 

The challenge lies in applying a new technique to the watch’s aesthetic and shape every time, finding a confluence between modernity and watchmaking tradition, a challenge and commitment crystallised by the Cartier Manufacture at La Chaux-de-Fonds. More than simply a production site, the Manufacture is a research hub, a creative and innovative laboratory that has succeeded in applying the photovoltaic principle to the Tank watch’s dial, without altering its aesthetic. A true technical feat that relies on the delicate and invisible perforation of Roman numerals, whose openings allow solar energy to reach the photovoltaic cells hidden under the dial. It took two years for the development team to integrate this SolarBeatTM movement, with an average lifespan of 16 years, into the Tank Must, the first watch to benefit from this technology. A pioneering watch that also introduces a bracelet produced in an innovative material that guarantees a high level of both quality and comfort. It is composed of around 40% plant matter, produced using waste from apples grown for the food industry in Switzerland, Germany and Italy.

The new Tank Must SolarBeat combines heritage with innovation.
The new Tank Must SolarBeat combines heritage with innovation. Image of Cartier boutique at Place Vendôme in Paris in 1975. Image Credit: Cartier 

Environmentally Sustainable Watch Straps

The production procedure represents a step forward in preserving the environment by reducing our carbon footprint (6 times less), saving water (up to 10 litres) and energy (up to 7 megajoules, or approximately 200 smartphone charges) compared to the manufacture of a calfskin strap. We’ve taken a local, European approach: the apples are grown and their waste collected in Europe, from the material production site in Italy, to the strap maker in Portugal and the watch assembly in Switzerland. Loyal to its reputation as an avant-garde timepiece, the Tank watch hasn’t quite finished telling us what it has to say. Its creativity is limitless. Once again with the Tank Must, Cartier dares to make its timepieces evolve with the times while looking towards the future.

Should you have any Cartier enquiries, our team of Watch Specialists would love to assist.

Steel Tank Must watch with light green non-leather strap SolarBeat photovoltaic movement. Image Credit: Cartier
Steel Tank Must watch with light green non-leather strap SolarBeat photovoltaic movement. Image Credit: Cartier

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