Cartier Tank Must Small Diamond Set Leather Strap Watch W4TA0016. Stainless steel 29.5mm x 22mm case and diamond set bezel set with 40 brilliant-cut diamonds (~0.39ct) all on a black brushed calfskin strap. This ladies watch Features a silvered dial with blued steel hands and black roman numerals. Water resistant up to 30m and sapphire crystal glass. Quartz movement.