I have my great-grandfathers duck gun, a W. W. Greener 12 bore with 30 inch barrels. It must weigh almost 15 pounds; can't imagine swinging it to keep up with a bird. It has damascus barrels. I'd like to find out the date of manufacture, so if it's an antique, I can avoid a lot of hassle Does anyone know if somewhere in Britain there's a register of what Greeners were made in which years, by serial number?