There is an excellent record called "Global Accordion" (don't have it to hand at the moment) which has 20 different recordings from the 1920's of accordions in a whole range of cultures, from Switzerland to the Caribbean, illustrating the spread of the accordion around the world, and what each culture did with it. Completely fascinating. The musette wars in France between the Auvergne musette and the Italian accordion should be made into a movie.
yours, Peter T.