the shot gun is from the unitied arms co ltd belguim, it is a double barrel,choke # 182,stock has double hammers,a lever on top and has numbers on it where the barrel sits, these numbers are 248, and 9014

Without close inspection it's really hard to provide more information or even an age. United was likely not actually a manufacturer of guns, they were likely an importer that bought various guns and imported and sold them in the US.

As Frank said, Belgium has a centuries-old history of arms manufacturing and often in the case of shotguns these guns were built by self-employed gun makers that often worked in their homes or small workshops. It's the ultimate "cottage industry". Often barrels were purchased from a factory and the rest were machined by hand in these home workshops.

Fine examples were sold to wealthy Europeans as custom built guns, many with fine artistic scrollwork and woodwork. More basic examples were sold to dealers who would sell to importers.

The dealers would have the guns "proofed" at a certified proof-house in the city of Leige, then the importer would stamp them and sell them throughout the US and other countries. Since there were so many makers and versions, ranging from commercial quality to superior quality, it's nearly impossible to ID these guns without a detailed inspection by someone who is expert in them. Even then, the experts have very little history or records, as this was not a large factory that kept detailed records. They can usually tell you a time period and a quality rating and a ballpark figure for value.

Be very careful with the gun- a gun that has hammers on it
( the double barrels) are very old and were designed for black powder shells- the modern smokeless powder shotgun shells produce too much pressure to shoot in the old doubles Have it checked out by a gunsmith - he can tell what the barrels are made of by looking at them. Any double barrel that is old enough to have hammers on it is worth a good bit of money as a collectors item.