IF IT'S NOT BROKE.........DON'T FIX IT!
Vintage Airguns Gallery
..Above link posted with permission from Gareth W-B
In British slang an anorak is a person who has a very strong interest in niche subjects.
Thank you both for the info.
I have fitted the sight on my Weihrauch HW77 and it fits like a glove on the 11mm scope rail.
The front tunnel also fit quite good.
Best wishes.
Elmar