Photo-Jumelle detective plate camera. Jules Carpentier, Paris. Sold by Photographic Association, 16 Brook Street, Hanover Square, W. Field-glass form magazine plate camera for 2 1/2 x 3 1/2 plates - 17 plateholders in changing back, worked by pulling and pushing rod. Taking lens F. Krauss, Paris Zeiss anastigmat No. 16652, F:110mm, f8. Iris calibrated 11-2 units. Single speed shutter with dashpot device calibrated 1-5 for slower speeds. Viewing lens image seen through red window. Screw focusing inf.-1.5m. No.6919-3. (M2400)