Patent 1323531 Dec 2 1919 Edward R. Hewitt – engine manifold vacuum tester. patent 1950052 Mar 6 1934 Butler J. Haskins – automotive engine diagnostic device.
Vintage Cigar Box With Vintage Vacuum Gauge And Vintage Compression Tester.
Vintage Compression Tester
Vintage Compression Tester & Engine vacuum/Fuel Pump Pressure Gauge
Vintage Compression Tester Gauge Analog w. original box USA Made
Vintage Compression Tester 300 LBS. Per Square In. Made in USA
