1960’s Early 1979’s Shin-EI -Foot Pedal-On and Off switch. This is the on off switch on the back of every vintage Shin-Ei Univibe Foot Pedal
It’s an extremely hard part to find part.
if you have an Original Uni-Vibe with a broken switch this is the exact replacement part.
I purchased this over 12 years ago from a seller in Japan who had leftover old stock new switches.
I paid very close to what I’m selling it for