For sale due to warehouse cleanout! This is an old Gakken Electronic Block set. One owner, and operation has been confirmed❗️ However, since I haven't tested all 100 circuits, please refrain from purchasing if you are looking for perfection! An acquaintance purchased this in the Showa 50s (1975-1984) and I received it later, storing it in the warehouse. Please check the photos for the included accessories. As a service, I will include 4 new AA batteries. If you are interested, please consider purchasing. Please note! When purchasing, please understand that this is a vintage item, and NO RETURNS❗️NO CLAIMS❗️will be accepted.