About 2/3 down is a J.D. Dougall Lockfast Hammerless Pigeon Gun
https://www.vintageguns.co.uk/magazine/no-charge-can-hurt-the-gun

Sig. Graselli used a Greener in 1897 before switching to a Scott
https://books.google.com/books?id=rEghAQAAMAAJ&pg=PT6&lpg