X. Phot. No it is the outer lens housing of the lens that was removed and I have since removed the rim to clear the way to the pinhole.
If you are familiar with the Agfa Clack see my sketch:http://www.flickr.com/photos/6720285...n/photostream/
This link one of many:http://sv.wikipedia.org/wiki/Fil:Agfa_clack_sst.jpg