🅰🅻🅸🅲🅴 (🌈🦄)Found this awesome Sargent solid brass 4-lever pancake push-key lock at the vintage hardware store.
Probably dates to circa 1895-1910.
Fun fact: the shackle spring is so strong that it holds some of the levers in place when you set them, hence I only had to poke it a couple times to set them all and pop it.
Jason Schwarz