You will have to provide specifics to even have a slim chance of getting an answer. Who made the barrel? What weapon is it on? Where is the number on the barrel?
not sure
When whiskey is bottled a number of oak barrels are dumped and blended together and bottled. Single Barrel Whiskey is bottled from one single oak barrel. Double barrel whiskey is aged in oak barrels then they are dumped and sometimes the proof is lowered and then put into a second new oak barrel to be aged again.
Could be a part number, serial number, inventory number, etc..
when did spring make 12g single barrel shotgun serial number 30368
50-100 USD
Many early ones may not have a serial number. If they do, it will most likely be on the side of the receiver. There is a small chance it will be inside, after you remove the barrel.
Double barrel? Single barrel? Model? Need more information in order to be able to answer.
Check the frame, barrel, butt and under the grips
1901 single barrel shotgun, washingtion
28 gauge with single barrel How do you find its age and value?
What year was riverside, 12 gauge, single shot ,model 548 made