I'd 1st say it's a Birmingham 6 bore, but 0.873" was for a 7 bore. Sometimes the finishing/polishing made it a little larger when it was apparent that the tubes weren't finished. Is it rifled? Is that a "W&CS" stamp under the right tube? Looks like it might have been checked twice with the 2 "7"s and the crossed scepters on the plugs.

Kind Regards,

Raimey
rse

Last edited by ellenbr; 01/12/09 11:11 PM.