I’ve been checking out some accordion videos on you tube lately and keep seeing the same brand names that weren’t familiar to me before. I had the understanding that most accordions in Italy were made in Castelfidardo. But when I look up these other brand names they are associated with either a manufacturer or store in Northern Italy, with Stradella being common to at least two. They also seem to feature less conservative appearance than I am used to seeing from the well known names from Castelfidardo. Some of these brands are Cooperfisa, byMarco, stocco, and ropa. I believe the first two build or at least finish their own instruments, anybody know about the other two? Maybe just branding for another maker?