Just a thought, could a member of the public be able to take pictures for you at the Proof Museum, or do you actually want shots from a period that predates the collection ending up there in the first place ?
Vic Thompson.
Either would be fine, Vic. I don't even know if there is an airgun display currently at the museum, which is by-appointment only. David (Troubledshooter) posted a while ago that much of the McCrossen collection was in storage.
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.