Manufactured in accordance with CID A-A-5581 and MIL-S-14823A 0 to 60 minutes (60 min. register) 1/5 sec. divisions Time-out 2 button function Instantaneous Return: by depressing side button in running position, hands return to zero (and by releasing the button results in both hands starting to record the next interval of time) Large central minute register increases legibility Fibershell case (resists corrosion and erosion caused by acids) dust and water resistant Antimagnetic and shock resistant 7 jewels Made to Government Specifications.