Original pre-war era bicycle fold-up foot pegs (for a rear seat). They have even pitting and are a bit rusty, but still functional. They have a rather nice makers mark that looks sort of like a waffen amt. The maker looks like it says Gevov. Very rare bike accessory. I believe these are intended to pair with a sort of child's seat or light duty rear seat. You wouldn't be putting a full grown man on these.