Lots of John's pics here:
https://forum.vintageairgunsgallery.com/airgun-shows/
Lots of John's pics here:
https://forum.vintageairgunsgallery.com/airgun-shows/
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.