LEITZ ELMAR f=9 cm 1:4 Nr. 1386299 (1956) collapsible Leica M-mount lens. 39 mm filters.With Leitz yellow filter and front and back original caps. Small signs of wear or normal use, no signs of misuse.
This "[...] collapsible mount is a work of genius: Leica has it locked-out so you can't focus, and therefore accidentally shoot, unless you have it fully extended. It works great on everything including the M7, but look out: Leica specifically cautions not to try to mount this lens on the M9" (K. Rockwell).