Cartier Tank Must! Limited-time offer: interchangeable imported lychee-pattern calfskin available at retail stores. The new Tank Must watch was launched by Cartier in 2021. It Must be a TANK! Among all the classic Cartier Tank watches, if I had to choose one to wear daily, I would definitely pick the TANK Solo. However, this may change with the latest TANK MUST from 2021. This year, the brand has introduced the entirely new Tank Must series, which, with its simple and precise lines, is regarded as a model of Cartier's elegant style. The design of the watch has been innovated while maintaining the original version, featuring rounder lugs and an adjusted dial proportion. Cartier has set a round, gem-set crown with a ball-shaped winding mechanism, equipped with the original ultra-thin custom quartz solar movement. Feel free to compare the internal structural details! It comes with the original imported calfskin! The texture is delicate and soft, fitting perfectly against the skin! This is not the ordinary market version! The Tank Must series watch also employs the brand's iconic rectangular case! The medium size measures 33.7 x 25 mm, while the small size is 29.5 x 22 mm, with a thickness of 6 mm. The dial features a silver plating and sword-shaped blued steel hands, along with a crystal glass and a unique blue spinel set in the crown! Compared to previous models, the lines are more rounded and fluid. Additionally, the watch is equipped with a quick-release strap feature, greatly enhancing comfort and convenience for daily wear!