Vintage Japanese autotransformer voltage converter made by Matsunaga MFG. Designed for stepping common Japanese and US mains voltages up or down for compatible equipment. Useful for running 100V Japanese electronics on US power or for lab and bench use. Compact metal enclosure with built in breaker and grounding point.

Notes
This is an autotransformer, not an isolation transformer. Input and output share a common winding. Use only within rated capacity.

Condition
Used. Powers on. Normal cosmetic wear from age and use. No further load testing performed.

Technical specifications

Shipping

Picture shows actual item that will be shipped 
Ships in anti-static wrap and proper box padding for protection