The Marche and the Abruzzo have hosted for a long time the best manufacturers of du’ botte but, from the end of XIX century, Castelfidardo became an important center for the creation of the accordion. This led a growth of the offer of work for many families which lived in the area , because the industries commissioned the work also to the specialized families. Thanks to the emigration in 1913 there was exponential growth in the production of accordion of Castelfidardo; these handmade products were distributed in the world because they were synonymous of quality. The crisis of '29 hit also this market but it had a quick recovery, thank to the interest by Benito Mussolini and to the desire of carelessness afterwards the armistice. The 60s were protagonists of another crisis in the market, this is due by change of musical genres like the rhythms of Elvis Presley. This air of novelty led to the production of the Cordovox, certainly suited to the new sonority. Today the three manufacturers of Castelfidardo are managed to find a niche in the musical market thanks to the recovery of popular music and thank to love for this extraordinary instrument.