Yeah. They were worn just about everywhere even slightly sunny that the Germans went to, from China to Macedonia. Most famously in DSWA (they seem to have really liked them down there, and didn't wear much else on their heads), in fact the German name for the hat was Südwester. But even in places where they were less popular such as German East (where sun helmets were where it was at for the fashion-conscious) they could still be found.