Snap on compression test set in a KRA-124A metal case.   Looks to be on used a couple of times.  Booklet of specs is from 1973.  Being sold as used untested as is.   Case is in great condition for its age.  Original packaging material is still in tact.

Brand: Snap-On
Engine Type: Gasoline
Type: Vintage Snap-On Tools Compression Gauge
Features: Multiple Measure Scales, Pressure Release Button
Country/Region of Manufacture: United States