These are all Continental guns.
As I'm sure you know, the first one is Belgian, #2 & #3 are German, the fourth is French, and the last one is Spanish.
Do you have any pics of them? Do you know their details - gauges, barrel lengths, etc? I'd love to know more about them.
Kettner was a well-known German maker. Their guns are pretty common. Someone here will know more about him than I do.
Ugartechea is one of Spain's oldest shotgun makers, maybe the oldest. They're still making guns today and they're also pretty common.
I'll check and see if I can find some info on the other makers.
OWD
