It is manufactured by HeathKit and has a manufacturer part number of CL-1040. The timing light is designed for diagnosing and adjusting ignition timing on vehicles.
Vintage HeathKit Timing Light CL-1020 12 Volt Systems
Vintage HeathKit Timing Light CL-1040
Vintage Heathkit Timing Light CI-1020, 12 Volt System with Manual
Heathkit Timing Light Model CI-1040 12 Volt Systems
Nos Vintage RAC Timing Light No 1537 Made In The USA Rite Autotronics 1972
Vintage Schauer Timing Light, Model A8290
