This Cartier Tank Solo Medium (Ref 3168) runs on a reliable Cartier quartz movement. The 31 x 24 mm case features 18k gold over stainless steel with a clean white dial. Comes on a new brown leather Cartier strap. The watch was serviced in July 2026 and is in excellent working condition. Serial number 31687514578UX confirms authenticity, though original box and papers are not included.