There is no way to tell the gauge from the serial number, and that may not even be a true serial number. Diamond Arms were made by several manufacturers for distribution by the Shapleigh Hardware Company of St Louis between the 1880s and 1940s. Anyone familiar with shotguns should be able to determine the gauge by looking at the gun, but to find the proper ammunition you should also have a gunsmith measure the length of the chamber.
It your shotgun a Model 37-S or 37-T ?
With the serial number that you provided,your Ithaca double barrel shotgun with the damascus barrels was produced in the year 1900.
Check the barrel and receiver
I saw one in 90 % condition with pitted barrel sell for $150.00
You may have to break the shotgun down in to the barrel section and the receiver section first.Look under the barrel section on the flat just ahead of the lug for the serial number.
look on the breach, barrel.
Try the receiver, barrel, forend
Check the receiver and barrel
Who made it, what caliber is it, is it a rifle, shotgun or hadgun, how long is the barrel, is the barrel round or octagon, what is the stock made out of, what is the serial number(if any)? Who made it, what caliber is it, is it a rifle, shotgun or hadgun, how long is the barrel, is the barrel round or octagon, what is the stock made out of, what is the serial number(if any)?
Please identify the model and recheck the serial number to be sure there isn't a letter associated with it. Thank you
next to the barrel
Try loooking on the reciever, tang and barrel
That is impossible to determine without knowing the manufacturer and model of the shotgun.
Please include the model number of your Winchester shotgun to get a correct answer to your question along with the serial number.
It sounds as if you have a Ithaca Crass model shotgun,that was produced in the year 1903 by your serial number.
Serial numbers were not required before 1968. If it has one, check under the forearm, on the barrel and on the action.
If it is a double, remove barrel and you will see it along with serial #.
Around July of 1925
it is worth about 400 dollars
Look on the receiver and barrel.