Cartier Tank Must Small, reference WSTA0051, featuring rectangular Tank case, silvered dial, Roman numeral hour markers, blued-steel hands, and stainless-steel bracelet. The Tank Must Small is powered by a quartz movement and measures approximately 29.5mm x 22mm with a 6.6mm case thickness. This model has a steel case, blue cabochon-style crown, and rectangular glass.  Features: 
Brand: Cartier
Model: Tank Must Small
Reference Number: WSTA0051
Case Size: 29.5mm x 22mm
Case Material: Stainless steel
Bracelet: Stainless steel Cartier bracelet
Movement: Quartz
Dial: Silvered dial with Roman numerals
Crown: Blue cabochon-style crown
Max Wrist Size:  C-654BCHH97