Here's a link to a Cowan's auction of a field grade hammer-gun made by John Fry of Derry, Ireland.
https://www.cowanauctions.com/lot/irish-...er-derry-138748I wish there were more pictures and details because this John Fry gun has nice lines. Jagermeister ought to be along shortly to advise bobski to buy either an Ithaca pump or an A5 Browning.
Guns are obviously made just about everywhere, even by prisoners in penitentiaries. But some areas or cities just have all of the ingredients, such as sources of hydropower, coal, iron, steel-making, highly skilled machinists and assemblers, and the political climate to make them especially attractive to a thriving gun-making trade. A market of willing consumers helps too.