lens rear cap for Elmar 50/2.8

Hello,

Does somebody know the leica reference # for the rear cap of the collapsible 50/2.8 Elmar (ancient version) ? Where can I found one ?

Thanks
zonesys

screw mount or bayonet?
if you're looking for the deep cap be prepared to spend a bundle.

The ORYFO/14050 (1951) is the rear cap for threaded lenses, and the IZQOO/14051 is the rear cap for M bayonet lenses - according to the Hove Leica Accessory Guide. B&H also lists a #14269 as the rear cap for M lenses ($19.50).