You will notice many small lines,circular lines through the steel. Damascus is actually laminated steel which could accept the much lighter pressure made by black powder shot shells.
If the fine lines are visible in an area where the steel is lightly worn, then the barrel is likely damascus. If the lines are not visible, it is possibly "fluid" steel, meaning that it's not damascus. Up until early in the 20th century, gun manufacturers attempted to duplicate the appearance of damascus on what were stronger barrels.
In either case, do not shoot the gun until you have had a gunsmith check it out.
No.
A damascus barrel is a barrel made of damascus steel, which is steel produced by hammering two different steels together. The twist refers to the pieces of steel being twisted while they are hammered, which produces the distinctive pattern on the steel.
Damascus barrel (in French).
Not.
You don't.
Damascus is a type of steel used usually of older firearms and tools
With the serial number that you provided,your Ithaca double barrel shotgun with the damascus barrels was produced in the year 1900.
Impossible to answer without knowing make and model.
Yes.
it is all swirly
Needs to be examined by a gunsmith
I need the answer