Interesting finding. I saw something similar at my friend's house in Greece, his father bought that gun a long time ago (he couldn't remember where), there were some parts missing though, I am not sure if it's of any value, but it is beautiful just for a collection.
Is this spam?
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.