Proton Robot. Rear early production version which was long sold out by factory around 20 years ago. Unique primitive 1950's style square head and spring across his head. Proton Robot stands 5 inches tall and designed to walk via "pin walking" foot design enabling him to sway side to side as he moves forward. He carries a wrench in his hand as his arms also mechanically sway back and forth as though he he is marching. Please note my remaining stock is for display and not working. May be fixable and selling as is. Tin Robots are adult collectibles not for children.