This is a West Super-0 camera bulb flashgun, made in Japan.
The case is silver and very compact. It is easy to open and unfold the fan reflector. The battery compartment is clean and easy to open. To use, the device requires a B battery (BL-015 22.5V) and a capacitor.
The item measures: 4.5" x 2" x 1.25"
The item appears to be in very good condition.