© 2013 Oscar Cintronmarina
The Riken 35, when viewed from the front, appears to be a prototype camera based on the way it was designed, that was accidentally released into production.  It reminds me of the the initial stages of development.  It’s got a good Riken Ricomat lens and several other amenities.  The speeds are from 1 second to 1/500th of a second--topnotch for that era.  The f/stops go follow from 3.5 to 16 and it  will flash at any speed.  It’s got the Seikosha- Rapid shutter mounted like a backpack on the side of the lens proper. This camera has an arm with a hinged movable lever underneath, which is used to wind the film to the next frame.  It’s intuitively positioned and easy to use.  The shutter release button is
surrounded by a knurled button that unscrews and allows you to add a shutter release cable adapter.  The Yashica 635 has the same feature and there’s probably many others.  It’s equipped with a generous viewfinder window, that can be unscrewed.  There’s a light-orange or peached colored square when focusing.  You can see the tint in the above photo displaying the front of the camera.  The Ricoh 35 seems to be what came after the Riken 35.  It’s sleeker looking in the front and lacks the superior SeikoshaRapid shutter and came equipped instead with the Riken shutter which gives it only a maximum speed of 200 with the slowest speed going only as low as 10.  It’s a very good
camera but without the turbo. The back slides off by turning the two circles underneath from “C” to “O.”  A very good and easy camera to handle.  It’s all metal so expect some weight with this unorthodox camera.  The faux leatherette is about the only plastic visible on the outside.  Below you’ll find a few samples from this camera.