This has been in my garage the last 45 years. I've never used it, and I believe it was never used. Cool old collector piece for your garage.
Vintage Simpson TRT Auto Ranger Transistor Regulator Tester
NOS vintage Simpson Large volt/panel meter Sun? engine analyzer 1950s 1960s
Vintage Carbon Pile Battery Load Tester Battery Condition Test NOS
Vintage Heyer Instruments Battery Condition Cell Meter N.P. 216 Battery Tester
New NOS Vintage Heyer Atlas Battery Polarity Protector Modification Kit PMK-1
Vintage! Custom Autosound Battery Lifesaver
