Hammer Brand Imperial Toothpick Candystripe 1950s vintage switchblade knife

Vintage Hammer Brand toothpick style switchblade made in Providence, RI in the 1950s by the Imperial Knife Co. It was designated the model JM-90-PBC and measures 4.25 inches closed and 7 9/16 inches open and has steel liners, nickel silver plated button and safety. The blade is 100% full with original factory finish and is Beautiful with Hammer Brand USA on the tang with a picture of an arm holding a hammer. The backside is marked PAT NOS 2170537 over 2281762. The scales are hollow metal wrapped in Candystripe celluloid with a little spotting underneath and light handling scuffs. The knife works well with blade tip seating deep and centered closed, opens fully and locks open with about 1/8" movement both ways at the tip. Does rattle if shaken when open. Safety works. EX condition.