Quote Originally Posted by Steve Smith View Post
Actually, I haven't thought this through properly.

If it had film on it, it wouldn't matter as neither side locates in a slot. It only needs a slot when used as a take up spool. Then it can be put in to match the position of the winder.

I still haven't seen one like this before though.

Just checked and I have a few plastic 120 spools like this in my darkroom "junk box", from film used a few years ago, but I have no way now of checking what the brand was. Hadn't really noticed that it was in any way unusual.