cameras i have seen that were direct positive / postcard cameras
didn't have a top that opens like this one does.
this almost looks like it was made out of a box.
the lens was just attached, the tanks underneath, and the sleeve
for grabbing and developing the post card ... and is based on
the mandelette, or the daydark ...
its archived, but just the same
you might find some clues at boxcameras.com
i think the guy that started that site has a myspace page as well ( current ) .. so
he might be able to help you ...