oscroft
Veteran
Back to the original question - when I was looking for a Z3/3M some time ago I did some research (sorry I didn't keep the links), and there do seem to be a lot of claims that the slow speed mechanism was really quite nasty and broke easily. Sure, you'll get reports from people whose Z3 slow speed mechanism is working perfectly - but I could also show you examples of heavy smokers who have lived into their eighties. Statistically, from what I read it did seem to me as if the Z3 had an inferior mechanism. (I ended up getting a very good 3M from eBay and it really is very nice indeed)