OWD
Yes, they are 12's. I can send pics if you would post for me. I don't have a hosting account.
My guns are labeled, G. Higham & Son, Warrington. Numbered #1 & #2 w/consecutive serial #s. Former owners have researched and documented the history and crests on these guns, and it is thought that the original owner was a relative of Lord Ripon.
They are also serial # by Scott on the bottom of the barrels and are also consecutive. Scott # 6011 & 6012 for 1875.