Showa retro collection. Inner core (width) dimension: 54mm, Inner core to inside (depth) dimension: approximately 10.7mm. Includes 3 keys, unused but function tested. It works without any problems. Body width: approximately 88mm, Height: approximately 60mm, Thickness: approximately 16mm, Weight: approximately 220g. I found and bought it at a general goods store; I liked the retro design. The body and keys were in separate plastic bags inside the box. Discontinued product.