I got a Fed 2 rangefinder camera to sell in my shop . It seems to be a younger specimen than my own Fed. The differences are not very obvious. The top camera is the older model. As you can see I had to make a piece raising the cold shoe to be able to use a viewfinder for my 35 mm lens. Since the cold shoe is placed in a recess the finder didn't fit. On the newer version the cold shoe has been raised as you can see.