I am selling a very interesting photo lens.
It has two rings with different series and different names. The first ring is
engraved with Carl Zeiss Jena with the series 6404185, and on the second ring
only Jena and the series 6294816 are engraved.
If the first ring is tightened, it
perfectly covers the second one. The glass is untreated, clean with very fine
scratches. The diaphragm rings without oil. The focus works relatively easily.
Thanks for looking.