Quote Originally Posted by elekm View Post
First, can you clarify whether it's a Retina II (as the title indicates) or a Retina IIa (as the text indicates)?

Next, is this the model with lever wind? If so, then it's a IIa.
There's another IIa (type 150) made between 1939-41 with knob wind. If it really is a IIa, and his grandfather bought it in 1946, it must be it. Only 5107 examples of this model was made.

It was sold with f:3,5 Ektar, f:2,8 Xenon and f:2 Xenon.

The Xenon lenses differed from the post-war versions. The 2,8 Xenon is actually a Xenar with an extra element (the front element "split" in two).