Edgemaster Keychain MyTmite vintage switchblade knife near mint

Vintage Edgemaster keychain automatic knife. Made in the late 40s or early 1950s by the Federal Knife Co of Providence, RI and was marketed with the trademark "MyTmite". They were usually sold from display cards that held 12 knives and sat on store checkout counters. The knife measures 4.25 inches open with brass liners and steel button, safety and shackle. The blade is full and shiny and is marked Edgemaster USA PAT PEND. The light green swirl synthetic scales are in excellent condition with just a bit of shrinkage. The knife works great with the blade tip seating deep in the well, good snap and tight lockup. Safety works well. This knife is in near mint condition.