Mamiya 6x7 back on a Mamiya 23 body

Bill Keeler from New Mexico, USA is sending me a Mamiya 6x7 filmback and the frame of a Mamiya 23 body. It should arrive end of August.
I'm gonna make a pinhole camera out of it. I'll post a photo documentary of my tinkering on this blog and on the www.f295.org pinhole forum.
Below you'll find a picture of what this camera must have looked like in better days.
To be continued in about two months.....