ACTRON Automotive Analyzer-Tach-Dwell-Voltmeter No 615 USA Made Art Thermal and electrical protection is

Thermal and electrical protection is built in and is designed to protect thaw amplifier against abnormal heat build-up and short circuited or overloaded outputs

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This sustem is in its original presentation case

the Glass Lid is marked Pyrex #7756-C K-4 and the Glass Handle is marked Pyrex #8336 B-3

ACTRON Automotive Analyzer-Tach-Dwell-Voltmeter No 615 USA Made Art Thermal and electrical protection isMade in USA ACTRON Analyzer Tach Dwell Voltmeter for 12 Volt Electronic or Conventional Ignition Systems Model No 615 This analyzer has been hardly used and is in very good condition. The box shows evidence of multiple moves but the meter spiffy clean. I have owned this ~35 years and just once used it. I just tested it and it works flawlessly. This analyzer tests 12 volt conventional & electronic ignition systems using vehicles battery 4, 6 or 8