Nixon Regulus MK-1 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. Watch Size: 44.5mm Watch Case Material: Polycarbonate Watch Case Thickness: 15mm Watch Crystal Material: Hardened Mineral Watch Movement Type: Quartz Digital Water Rating: 100 Meter / 10 ATM Lug Measurement: 24mm Band Material: TPU Band Connection: Screw Bar Band Type: Free Swing