I would look at the number of barrels. If there is more than one barrel, you know you have at least a double barrel shotgun. If there are 1 or less barrels, then you don't.
I have a 16 gauge double barrel for sale.
The T C Montgomery double barrel shotgun with double barrel hammers is valued at $75 in fait condition. In good condition its valued at $160.
The cartridges will pop out.
I'm not sure of the value of your shotgun. I have a Montgomery Wards Hercules, double barrel shotgun, with external hammers. With all the research I have done it is a Stevens 217. I have been looking for a set of barrels for this gun. Can you describe your gun to me. Petter
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.
With the serial number that you provided,your Ithaca double barrel shotgun with the damascus barrels was produced in the year 1900.
Watertable, forearm metal, and barrels
From markings and proof marks on the gun barrels and the frame. In some cases you need to remove the barrels, and look on the underside from markings.
If this is the model 215, the barrels are steel.