Which Zeiss Ikon Lens Cap Is This?

[Chubberino]

Heya,

I purchased this wonderful little Elmar 9cm last week and the front cap was this odd little thing marked Zeiss Ikon. It fits the Elmar well, but I have no idea what lens it would've originally gone on. Any help would be cool!

 

[Crazy Fedya]

I believe this is a rear cap for 50mm Lenses in Contax RF mount.

 

[Chubberino]

I believe this is a rear cap for 50mm Lenses in Contax RF mount.

Thanks so much

 

[Highway 61]

Yes this is the Zeiss Ikon #727 rear cap designed for the 50mm lenses in Contax RF mount. Also fits all the Nikkor 50mm lenses in Nikon S mount. This is an half rare item, it can sell for over $50.