A touch of electric release button also cocks the shutter and advances the film The camera is thus always ready to take a picture.
1/10s - 1/100s shutter.
2.7/20mm lens, later 2/20mm.
(Source Princelle 2nd edition)
Images 2, 3, 4 and 5 are from Detlev Vreisleben Archives
Serial # 450189. Private collector.
Images 6,7,8,9 courtesy of Dr. Milos Mladek
Image 10: http://www.zenitcamera.com/qa/qa-logos.html#oot
The UFA wasn't produced in UFA. The name means "Универсальный ФотоАппарат Universal Foto Apparat) and the camera was created bei OOT (Отдел оперативной техники Department of operational equipment of the 1st Main Directorate of the Ministry of State Security of the USSR, Moscow)