How did u know that my M6 is mint?
Anyway that's what I think too. Brought it to a repair shop at Shaw Centre which offers to get it done in a few hours for only $60. But the Mr Lim refused to open it up because mine is too mint and he's afraid that it might leave scratches and markings behind on the exposure dial and the red Leica logo. Furthermore, mine is only slightly out. So it can still function very accurately.