Age of the model you are talking about and markings.
10-100 usd
No published sn data
Antiques roadshow.
Impossible to answer without a detailed description of ALL markings and features.
Need a complete description of all markings to answer.
Matt Eastman's book on Browning.
Belgium is the country of origin, not a brand. Innumerable old damascus barreled shotguns were made in Belgium and imported into the US before and after the turn of the century. These were generally low cost shotguns, of no current collector value (better guns identify the manufacturer). If the Damascus pattern is pretty, and the receiver still has case colors, it may have some value as a wall hanger. DO NOT ATTEMPT TO FIRE IT! Damascus steel cannot withstand the pressures of modern smokeless powder. Even black powder should not be used unless the gun is fully examined by a very competent gunsmith.
Need detailed description of all markings.
Need a detailed description of all markings.
Unable to answer without a detailed description of all features and markings.
The use of damascus barrels on guns began to decrease pretty rapidly after 1900, although they were still fairly common up until the start of WWI. If you have a breech loading gun with damascus barrels it will probably date from 1875 - 1910. Most damascus barrels on U.S. guns seem to have actually made in Belgium. There is a lot of debate as to whether any damascus barrels for shotguns were actually made in the U.S. It seems likely there may have been small numbers produced in the U.S. However, Belgium had a large gunmaking trade at the time, with a lot of barrel makers specializing in damascus barrels, so it was generallly cheaper to import them than to make them.