Cartier Tank Must SolarBeats Small – Steel – 29.5mm x 22mm WSTA0089 SILVER ROMAN BLACK LEATHER

The Cartier Tank Must SolarBeat represents a modern interpretation of one of the most collectible designs in watchmaking history, directly descended from the 1917 Tank design. This WSTA0089 reference maintains the rectangular case profile that has remained exclusive to Cartier for over a century, executed here in polished stainless steel measuring 29.5mm by 22mm. The silver guilloché dial features the sought-after Roman numeral configuration, with the black printed chemin de fer minute track providing clear legibility. Cartier’s signature blue steel hands and the discreet cabochon cut sapphire set into the crown are consistent with historical Tank models. The black alligator-pattern leather strap completes the classic aesthetic, utilizing Cartier’s quick-switch system for straightforward strap changes without tools.

This model incorporates Cartier’s SolarBeat technology, a photovoltaic movement that converts both natural and artificial light into energy through nearly invisible micro-perforations in the Roman numerals. This quartz-based movement offers approximately 16 years of operation before potentially requiring a capacitor replacement, representing a practical alternative to traditional battery-powered quartz movements. The movement operates at standard quartz accuracy and includes basic time-only functionality without additional complications, maintaining the Tank’s original purpose as a time-only dress watch. The sapphire crystal provides scratch resistance while maintaining the vintage-inspired profile of earlier mineral glass Tank models.

This particular example is in mint condition with no visible wear, accompanied by Cartier’s international warranty card dated to the current year, confirming its new status. The Tank Must SolarBeat occupies a significant position in the current market as a limited production model that bridges Cartier’s historical design codes with contemporary technology. As an officially certified model with complete documentation, this watch represents a sound acquisition for collectors seeking modern Tank variations with technical innovations. The combination of the Tank’s enduring design, SolarBeat technology, and full factory warranty makes this reference particularly sought-after among both established Cartier collectors and those acquiring their first piece from the brand.