When I photographed my Retinette on Dec 20th, I mentioned trying to find an accessory rangefinder to go with it. I found one on eBay, bid for it and won the auction for the huge sum of £6.50. This isn’t it. This is my Dad’s, who lent it to me until I can get my own. It was dirty and wildly out of calibration - it hasn't been used for many years - but a few minutes work has it clean and properly adjusted. Simple to use, just look through the eye-piece, turn the dial until the two images merge, read off the distance, set the focus on the camera to match, and away you go.