There is also the 1955 Pentaflex SLR by Tokiwa Seiki.
image by Jaap Schelvis (Image rights)
It is a fully mechanical camera requiring no batteries. It has a cloth based shutter which has speeds of 1/30, 1/60, 1/125, 1/250 and 1/500 plus a bulb mode. The shutter release is located on the front of the body and is compatible with common cable releases. There is a locking feature on the collar that prevents accidental exposure during transport. McKeown says it is the same as the Praktica Nova.
- McKeown, James M. and Joan C. McKeown's Price Guide to Antique and Classic Cameras, 12th Edition, 2005-2006. USA, Centennial Photo Service, 2004. ISBN 0-931838-40-1 (hardcover). ISBN 0-931838-41-X (softcover). Page 584.