Thanks for the comments all, I like it too. The metal frame bed with quick release make for a very minimalist, light and versatile camera.

The lens is a Wray RR 5.5 inch which I don't think really fits the camera as the wheel stops the bed from closing in the camera properly. I wonder what shutter would be best? I don't have one small enough to fit with the lens when the camera is shut.

This is the back...