Hello,
This appears to me to be either an early Sonor or Trixon bass drum pedal. It came without a beater and the leather strap was broken from age and dryness. I replaced the strap and added (and bent) a beater to fit. The seller thought it might be from a cocktail kit. The beater does not travel very far at all, and is slightly smaller than the normal diameter beater shaft. I could find no markings except for "KGB" and "K R 1" on the chrome portion of the axle. Maybe the "KGB" explains it all, a spy pedal?
I saw a similar pedal in a 1958 Sonor catalog and it does have the same blue paint color as early Sonor pedals I have seen. If anyone has any thoughts or leads, I would appreciate hearing from you. Cheers, and stay safe during the "new normal".