Originally Posted by zuikologist
From a total Nikon ignoramous - what is the relevance of the underside of the wind lever?
There were a multitude of changes in the design and manufacture of the Nikon F during it's 15-year run. These are sometimes used to determine the authenticity and integrity of a body, as many parts were interchangeable.
Richard de Stoutz's site gives a comprehensive listing and examples of all these differences, as do Uli Koch's books. Here is an example of all the different wind levers http://www.destoutz.ch/typ_wind-levers.html