[h0ughy (David)]

Originally Posted by CeratodusDuck

The tube diameter of these should be 141mm, so 140mm rings will be fine considering you are merely crushing felt for about 2mm. A few options are out there (besides contacting WO for a set - the 132 is still in production):

Obvious choice:
https://www.teleskop-express.de/shop...-diameter.html

Expensive choice:
https://www.teleskop-express.de/shop...ort-rings.html

Alternate choice:
https://www.teleskop-express.de/shop...-diameter.html

I'd be taking a very close scrutiny of the objective if I were in your shoes - the corrosion on the thumb screws and the black filth on lots of places - degrading black foam by looks of it? - would lead me to believe it has had a life in the hands of someone who didn't take care too well.

Thanks for that. It wasn't looked after well and was from a deceased estate however I will give it a good clean