A nice old specialty tool.
Vintage AUTOLITE PCV TESTER
Vintage AC Manifold Gauge Imperial Eastman System Analyzer
Vintage AC Spark Plug Div. GM PCT-1 Pressure Gauge 0-30 PSI Flint, MI
NOS Vintage AC Spark Plug Div. GM PCT-1 Pressure Gauge 0-30 PSI Flint, MI
Vintage AC Arnold Mfg Cam Dwell Indicator Auto Test Tool Mechanic Distributor
Vintage AC Arnold Mfg. Co. CAM - DWELL - INDICATOR Tester