Quote Originally Posted by momus View Post
Retina viewfinders tend to be dark, and of course squinty. It would be hard to find a better viewfinder than an R2a if you wear glasses, but I'd probably prefer to shoot the M2.
Most any blacksmith can fix a Cloth shutter on a M or CanonP metal one. The Cosinas are more difficult and noisy. My M42 SLR is a Cosina and is well reliable but noisy for people shooting their rangefinders are quieter but still more noisy than a M2 or CanonP.

A beaten up M makes good jewelry...

A Cosina SLR says COSINA on name plate terrible for street cred. You get sympathy.

An M is more expensive than a P or R probably best to get a LTM R if you go Cosina unless you buy new.