Nixon Sentry Chrono Leather watch. Nixing the status quo of what you may expect when it comes to classically good-looking timepieces, The Sentry Chrono has entered the room and raised the bar. Anything but standard, this custom-built chronograph and unmistakable crown design help strike a rugged balance of technical functionality and elevated style. Imported. 6 hand quartz movement with applied indice, printed seconds track, and custom molded hands. 42mm, 100 meter/10 ATM stainless steel case. 21mm leather strap with stainless steel buckle.