Originally posted by Laurentiu Cristofor
It looks like the first version based on the IR mark being to the right of the 4. I expect the rear element will protrude as well.
Unfortunately, the IR mark isn't 100% reliable when these lenses are in the overlap area of the Serial #'s (above 1,48x,xxx to 1,58x,xxx or possibly 1,83x,xxx). Plus, there are more than 1 variation on the face plate. For example, my Ver1 doesn't have the serial number following the focal length and aperture. Furthermore, I think tooooo much reliance on the IR mark has led to some mis-ID in Nigel's old m-fortytwo project data base. Its somewhat tricky to ID the rear element for people that have all models in their hand.
Regardless, this specimen will make a fine lens for someone.
Last edited by Blue; 06-29-2010 at 06:31 PM.