right, the orange handled knife with spring loaded clip blade and shroud cutter.
aka: MIL-K-25549, but common name: MC-1, designed so shroud cutter (which is the primary blade)could be used safely to cut parachute lines behind your head, and auto clip, for gloved or 1 hand opening to puncture accidently inflating life raft in pilots survival pack upon which he was sitting (ref. F. Trzaska).
first used by US Air Force 1957 and d/c'd in 1993.
made by: Schrade-Walden; Camillus; and Logan/Smythe; this last is v. poor quality. the earliest S-W has "Stainless" on the pile side, later versions had it on mark side under U.S.A.
so, back to my original statement: i bet the S-W and Camillus marked MC-! knives were all made in the same factory. but which one ?
roland