Finally made a 120 roll film pinhole - made very essay by the waterproof junction box I found.
Included are a shot of its front, the film transport, on a tripod and a shot from it.
It has a 75mm focal length, produces 5x11cm images with a f/285 pinhole.
I also used a shutter from an ailing Agfa Viking. There is a spirit level on top and a tripod mounting base on the bottom.