The left tube passed thru the Birmingham proofhouse between 1875 & 1887. The mark on the watertable you refer to is probably a crowned set of crossed scepters. It might be a 10 bore, but the right tube may be a thick brass 12 bore.

Kind Regards,

Raimey
rse

Last edited by ellenbr; 06/27/09 12:15 AM.