Bolex 10x viewfinder Diopter ring. New.

Description

For sale is this ring for the 10x viewfinder for Bolex reflex cameras. You get one ring. NO screw included.
This is a brand new piece. I made some of this rings that break a lot and there are no replacements. It's made of good quality polyurethane casting resin and it has some very small imperfections like small scratches that were present on the piece I used to cast the replicas.
This is a brand new piece, it's hard and it looks identical to the original one. Is it going to break? Well the part is a replica of the original. The walls around the ring hole break because there is not much space there. I replaced the one on my camera and this material feels less brittle than the original one, which helps because the ring doesn't have a thread. The screw is similar to the ones used on wood. It finds it's own way as it enters the ring, but I think the part would last for a long time.
Each piece has to be cast, trimmed, sanded, polished, painted and drilled so they may have small imperfections like tiny holes cause by bubbles, but they are perfectly functional.
Please don't try to send your old broken part and say the new part broke, they have a specific mark.
Thanks for looking.