This was from an estate sale phone so I do not know if it's history I do not know how to test it so it's being sold as is untested Please see pictures for better details
Vintage Cal Custom Hawk Dwell Tachometer Pocketune Meter
Hawk Dwell Tachometer Tester, Hanson/Hawk, Vintage Automotive Tool, Black
Sun Electric RPM Dwell Unit T 10M Analog Dwell Meter
Vintage Hawk Dwell Tachometer Tester. Made In Japan
Vintage, Untested Used Hawk Dwell/Tachometer Tester, RPM X100, Made in Japan.
