Have an older Harry E Hanson. Tester here. I did not try to use it. Did not open the Back. Looks pretty good.
Vintage Harvey E. Hanson Co. TL-324 Power Timing Light Chrome Paw Paw Michigan
Vintage Harvey E. Hanson Compression Tester Model 5 w/ Original Box (1963)
Vintage Harvey E. Hanson Co. Model 5 Compression Tester In Box Made In USA
VINTAGE HARVEY E HANSON CO ENGINE VACUUM FUEL PUMP TESTER SET OF 2
Vintage Harvey E. Hanson Compression Tester 16455-1 Model 1
Vintage USA HARVEY E. HANSON CO. MODEL 24 Chrome Power Timing Light Michigan
