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.
No.
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.
it is all swirly
Yes.
Needs to be examined by a gunsmith
I need the answer
Damascus steel is made by folding a mild steel together with a high-carbon steel to make it stronger, and gives it a pretty pattern. Problem with Damascus barrels is that, while they work fine with low pressure black powder loads, modern smokeless shotshells are likely to cause the barrel to rupture, which is bad. If a shotgun has a Damascus barrel, it's very old and probably just a wall-hanger.