RARE CANON FLASH TESTER CANON SCREW MOUNT RANGEFINDER CAMERAS IIS IV IVSB2

Rare Vintage Canon Flash Tester for Canon Rangefinder Cameras
Rare Vintage Canon Flash Tester for Rangefinder Cameras. One end tests Bulb and the other end tests Circuit. Lights lite up, red for bad and clear blue for good. Unusual accessory for the collector, don't miss out.