E. R. Armentino shows in my references only as a maker of shotguns. The .300 Holland & Holland is, of course, a rifle, and I find no listings of rifles in their products.
You will have to contact the maker to find out.
Mainly from the markings on the gun by the maker.
Belgian gun maker. Famous for his high end 300 Weatherby Magnum caliber rifles.
No published sn data.
The gun maker never sees a customer. Guns are sold to individuals not by the maker, but by a gun dealer. No, it is not the dealer's responsibility to ask a person what they are going to do with a gun.
Maker or manufacturer.
NUMRICH GUN PARTS SELLS DRAWINGS , BUT YOU HAVE TO HAVE THE MAKER TO START LOOKING
Enough to pay the bills and a little extra depending on their skills.
You make sprites that have the gun equiped all ready then make it so when your person touches the thing it changes its sprite
By maker information.
Remington is the oldest maker still in operation.
Colt was one maker who made the GATLING gun.