Just as an example:
When I was in sixth grade or so, and this was mid-to-late fifties, a music school named “Vinnie Roberts” opened in my neighborhood. Many of my schoolmates attended this school, mostly to learn brass or woodwind instruments, which the school also sold. The school also sold accordions with the name, Vinnie Roberts, plastered on the front. They were usually bought for kids who lasted a year or less as accordion students.
Imagine my surprise when one of these turned up on a marketplace with the “GENUINE VINTAGE VINNIE ROBERTS ACCORDION” designation. I don’t remember the asking price, but irt had to be much more than the accordion is worth at this point.
Those accordions, even when new, were nothing special. Yes, they had the “Made in Italy” badge on them, but so did a lot of other music school accordions. My first rented 12-bass came from the Wurlitzer music school, which was a subway ride away, and which gave me my start before switching to a teacher who taught me at home and supplied an accordion for my parents to rent. Unlike the Wurlitzer, it had no school name on it.