Historically limited to military personnel only. the Regulus Mk-1 is not your ordinary outdoors watch. It's designed for the elite. The only features included are those guaranteed to get your back during a pinch—including day and date. auto calendar through 2099. dual chronographs. alarm. silent mode and adjustable LED backlight. The ultra-durable and shock-absorbing case goes anywhere you go. The comfortably high-tech band never leaves your wrist. If you know. you know.