Lot of two 2x3x3.5" tall robots w/built-in keys. By Yoneya, Japan, 1960s. Both have tin litho bodies w/hard plastic feet and soft plastic antenna attached to backs. Detailing on both is quite different. The red robot wears a bow tie and has simulated gears visible on chest w/additional machinery on back. The mostly silver robot has pair of dials on chest, tanks on back. Has a more comical facial depiction whereas the other is more robotic. Both work and hop about when wound. Both are Exc.