The Diamet projector is used for the mono projection of Stereo reel pictures. It was sold in a Meopta paper box for 340 CS crowns in 1968. The Diamet shown below has an added fan. New projection lamps are hard to find for the Diamet. A suitable replacement lamp is Philips 6158N/05 220V 100W BA 15s. Click here for the manual, link to the catalogue sheet and the letter of guarantee sample.