This used lens holder was attached to an old E-II that has been out of work for a number of years. Removing the lensholder from the E-II was, apparently, too much of a struggle for my dealer, so, for a few peanuts more, I took home the entire thing.
As some of you know, the E-II came from the factory with an external shutter blade, that spinned in front of the lens mount. This particular one had been modified to take a barrel shutter behind the gate.
(This is what they used to look like)