It is a tool used for checking and adjusting the ignition timing of an engine.
Vintage Sears & Roebuck Penske Chrome Power Auto Timing Light 244.2115
Vintage Sears & Roebuck Chrome Power Auto Timing Light 244.2115
Vintage Sears Roebuck DC Powered Inductive Timing Light & Manual Model 4118
Vintage Sears& Roebuck Penske Chrome Power Auto Timing Light 244.2115
Vintage Sears Roebuck and Co. Penske Automotive Timing Light - Model 244.2115
Vintage Sears & Roebuck Chrome Power Auto Timing Light 244.2115 (TESTED)