Old wind instruments (c. late 16th- early 17th century and earlier) were tuned to "old pitch" (A= 430). You can still get these kinds of instruments if you want that mellow ring of authenticity in, say, a group that plays Early Music.

Standard pitch gradually went to A=440 because, among other things, it sounded "brighter". It's thought that "flat sets" of uilleann pipes were tuned lower so other musicians couldn't play along. It's more likely that they were just made to the common pitch c. 100 years ago. Things just moved slower then…