Vintage 1956 Leica 50mm Elmar f3.5 collapsible lens, chrome color.  This is the lens that collapses down to almost nothing and this is also the more sought after redscale version.  LTM or M39 mount, will require an adapter to work on M-mount or MILCs.  

As with any lens this old, there is some minor dust internally. Cosmetically the lens is in excellent condition, optically it also works great on camera but as with any vintage lens, this will not be suitable if you are fussy about getting a perfect lens. 

Will come with a brown leather pouch, a 19mm filter attached, front and rear caps.  All shown in the pics.

If interested please SMS/watsapp me directly as I may not check this site so often.  Thanks.