Normally on the frame/barrel/receiver
you will find it on the barrel or action of the firearm
Barrel and receiver are the most common place.
It should be marked on the barrel.
Serial numbers are not unique between makers. Impossible to answer.
If it doesn't, the bbl has been replaced.
Serial numbers are not unique between makers. Impossible to answer.
how to tell the age of a 12 gauge single barrel shot gun made by American Gun Company?
This serial number would indicate a gun made in 1904. To be sure that this is not an early gun, you can check the barrel. If the gun was made in 1904, the barrel would be stamped: BROWNING AUTOMATIC ARMS COMPANY It is probable that your gun is more modern. Check the gun for a letter above or preceding the 78xx number. The complete serial number would be required to answer the question. Thank you
Model 12 serial number 906770 was manufactured in April of 1941, and yes, they were made with a 20-inch barrel (the Riot Gun and Trench Gun).
When was this Gordon gun company double barrel 12 gage shotgun made. Serial number LD7158
Manufactured in 1898