I'm working on someone's Contax IIIa. Nice camera and has one of the smoothest helicals that I've come across. The rangefinder contrast is poor, and I cannot correct that (without placing some type of film on one of the prisms).
I'm currently in reassembly. The later models used two arms - one to lock the helical when changing lenses, and the second for infinity lock (which worked in concert with the helical lock). Earlier models used a single arm.
With this model, you have to reinsert simultaneously both arms, the helical and the swinging wedge prism assembly. That's a lot. Plus, there are washers for each arm and tension springs.
After I take care of this, then I'm going to find out why the meter doesn't work. It might be a contact issue, or maybe the selenium cell is dead. The meter needle assembly is fine.
