Model ET390, made in USA by MAC Tools. I've also verified that the DC volts functions as expected. I did use this regularly before it was retired.
Vintage Matco Tools MAC ET390 Electrical Systems Analyzer Tach Dwell Meter USA
Vintage Air Tools: Mac Ratchet & Matco Reversible Drill - Untested
Vintage MATCO TOOLS 3/8" Double Pawl Ratchet Wrench MT1829 Pneumatic Air NEW NOS
Three (3) Vintage MATCO Tools Toolbox Box Chest Cabinet Cart Pull Handles
Vintage MATCO Tools Toolbox Box Chest Cabinet Cart Pull Handle
Vintage Matco Tools HP-2 Hand Rivet Gun - "KLIK FAST" Heavy Duty Riveter - USA
