The A-2TR Vintage is inspired by classic U.S. military watches. The period authentic dial is complimented by our rugged U.S. Patented 40 mm solid titanium Unibody case. This watch has all the requisite features when it comes to delivering focused essential function... a precision Swiss made quartz movement with LBI Low Battery Indicator, durable screw down crown & case back, scratch resistant sapphire crystal, and a unidirectional titanium elapsed time / directional ring.