See Thru Piston Robot. Battery Operated tin and plastic Piston Robot made by Horikawa Japan circa 1970. Colorful Robot with lots of action and lights! Robot stands 12" tall and walks with bouncing lighted pistons in his chest. Beautiful near mint condition with clear plastic and no cracks. Complete with crisp box as seen in photo. This is version 1 with the solid leg and foot - later versions were made in Taiwan with tin feet. Currently on Ebay auction under robot_island.