l think you are right Danny it is a garden gun, there was one for sale at the Brum arms fair at the weekend, but l was told it's off ticket as it's in 7mm.
Thanks Mick. Is 7mm an obsolete calibre?
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.