Okay Torpedoman I have the book in hand. Here's the pictures we need. Right side action and barrel, left side action and barrel. Name and addresss. Proof marks bottom of barrels and on the water table.
68 Haymark is Greener House and was used from 1878 to 1916.
I found this passage in the Greener Book:
"Identifying the type, model, grade, and quality of Greener guns since 1881 can be difficult. Not all type or models were made in all grade and qualities and some guns which look indentical often house entirely different operating mechanisms."
With that caveat, post your pictures and lets see if we can generalized what you have.