This is USA made. The lens is cracked and is missing small sections of it. I think this is from 1969 based on the print date on the manual.
SnapOn, Compression Gauge Set MT3081
0-300PSI Engine Cylinder Compression Gauge Tester Kit Engine Compression Tester
Small Engine Cylinder Compression Gauge Tester Kit Gas Diagnostic Tester Set
Engine Cylinder Compression Gauge Tester Kit Gas Engine Diagnostic Tester Tool
