Thanks Garvin. What does the "No4" refer to then? Is it a model number?
Like I say, I'm not familiar with these.
Not sure why this model number was chosen.
Was it fourth in the BSA line up at the time? I suppose the Standard no.2, Club Standard no.1 (45 inch), and Light Pattern had all been going for some years previously?
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.