It's the working part of the Gaudin Apparatus. Google it and see how it
fits into the larger box.
From: Maren /Fred Friedman <marenfred@...>
Sent: Wed, Dec 12, 2012
Subject: Re: [woodandbrass] Lerebours & Secretain all metal
Camera looks like a Bertsch. Lerebours et Secretain were lens makers and
opticians to the best of my memory. Nice camera. Wish I had one.
tell me about this camera?