Thats the exact one. I'd post pics but don't like that you can't post them direct to the forum and have to use third parties.
If you email them to me I'll host them, and unless you object, put them in my gallery if they're good enough.
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.