This is a capacitor tester made for use by field technicians by TIF a HVAC instrument maker. The tester looks almost new. There is a slight amount of tarnish on one of the battery terminals, I bet you wouldn't notice if I hadn't mentioned it.
Up for sale is a Knight Capacitor Checker.Eye tube bright and functioning. Unit not fully tested.Missing plastic handle, otherwise in good condition.May need work, sold as-is/as-shown. No returns.Please see
General Radio Precision Capacitor Model 1690-A in original box, with calibration charts. Precision capacitor is in very good shape and includes the original calibration charts. See https://worldradiohistory.com/hd2/IDX-CATALOGS/IDX/General-Radio/General-Radio-Catalog-M-1951-OCR-Page-0104.pdf for more detailed information.