My father was a Leica enthusiast all his life. His complete collection is now being offered, with his consent. It is quite a list, see the other offers. Much has been sold, but this lens did not meet the reserve, this price is has now been reduced.
This Elmarit-M 1: 2.8/135 mm with glasses is part of a collection of lenses suitable for the M Series.
Apart from a few signs of wear and tear, this is still a really nice lens. The production year is a guess.