Manufactured from 1954 to 1957. This viewfinder camera was Kodak's 'economy' alternative to the Retina IIc and IIIc rangefinder models.
Unlike the six-glass xenon lenses used in the IIc and IIIc, the Retina Ib was fitted with a 4-glass Schneider Xenar, a non-interchangeable 50mm f/2.8 lens.
There is nothing wrong with the Xenar lens though, this camera will return nice sharp pictures.
The example above is from the earlier production, and shows polished alloy body edges. It has the chrome 'dot' in the advance lever disk, and the aperture setting numbers appear at the bottom of the shutter.
The example below is from later production. It has chrome trims top and bottom of the body casting. The edges either side of front "door" are in a black finish, it lacks the 'dot', and has aperture setting numbers at the top of the shutter.
Here is a link to a copy of the Retina Ib instruction manual on Mike Butkus' excellent website.