SCHRADE CUT CO M2 Bone WWII Paratrooper Military issue switchblade knife

Vintage SCHRADE CUT CO M2 Bone handled WWII Paratrooper Military issue switchblade knife made in Walden NY in the 1940s by the Schrade Cutlery Co under contract with the US Government and issued to soldiers during the war. It measures 4.25 inches closed and 7 5/16" open with steel liners, bolsters and lanyard ring (staple) and nickel silver button and safety cap. The clip blade is 97% full or better with heavy patina light scratches and some spotting and the tang is stamped SCHRADE CUT CO WALDEN NY on the front and US PATS DEC 21, 09, SEPT 13, 10 & JUNE 6, 16 on the reverse. The jigged bone scales are very nice  with no cracks or chips. The knife works well with the blade tip deep & centered closed, good snap and tight lockup open. Does not rattle if shaken with blade open. Safety works. EX condition.