The Tune up analyzer is in great condition. I did test it by attaching a D battery to the ends and the needle does respond and moves freely.
RAC Model# 566 Ignition Tune-up Analyzer With Box
RAC Model# 566 Ignition Tune-up Analyzer Dwell-Tach Volt-Amps Points
Nos Vintage RAC Timing Light No 1537 Made In The USA Rite Autotronics 1972
Vintage RAC Timing Light & Remote Starter Switch – NOS – Made in USA – No. 1503
