Never known of one to "wear out" to the point it could not be repaired, although the M3 in some instances can't have a damaged rangefinder repaired. Usually they just need an adjustment rather than a full-on repair, although shutter curtains sometimes need to be replaced. There's something to be said about a simple design, quality construction and materials, and skilled, careful technicians who assemble the cameras. I've known some to break because of a fall or some other damage, but just plain wearing out - nope.
Also, the design of the post-M3 cameras is such that parts are interchangeable between older and newer models. When I wanted to change the rangefinder/viewfinder mechanism in my M2, I had a choice between the M4 and several M6 rangefinders, all of which were 100% compatible with every Leica lens ever made. Shel > [Original Message] > From: graywolf > Oh, Leicas wear out all right. The fit and finish is superb however, > and that does cost a bit extra. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
