Headwarp (Vietnam War era) Tuesday July 26th, 2016 admin Hat, Cap & Balaclava, The Vietnam War 9,978 views Shown one contract number dated 1972. Used by doctors and nurses in the field hospital. Stock Number Reference: Headwarp FSN: 8340-577-4168 (Same as Tent shelter half) Assign Date: Unknown og107headwarpvietnam_war