A simple, Polish camera produced after World War II by the Polish firm Warszawskie Zakłady Fotooptyczne (WZFO). Like the French’s Photax II, German’s Pouva Start and Czech’s Pionyr, the Druh Synchro had ‘screwng’ retractable lens barrel. The Druh Synchro’s more modern and lighter successor waas the Ami cameras.
The Druh Synchro takes 6×6 cm or 4.5 ×6 (with mask) exposures on 120 film. It has a Bilar lens 1:8/65mm fix focus, and only one shutter speed,1/50 sec and Bulb mode. Aperture are f/8 and f/16.
More information :-
http://camerapedia.wikia.com/wiki/Druh
http://camerapedia.wikia.com/wiki/Druh