AV110CB MSTR AVIATOR - POLISHED / SILVER WATCH WITH CROC BAND The MSTR Aviator movement is a Japanese 6-hand chronograph movement by Seiko. This movement's functions include a stop watch timer, date window, 24-hour clock, and the time. It also utilizes a screw down crown. The case is made of NASA grade 316L stainless steel. The side of the case is beautifully engraved with the MSTR brand. This tough case is durable and will allow you to dive up too 100 meters under water (10 ATM). The MSTR Aviator features a leather band with a stainless steel "U" buckle.