Hi Alfred,

Thank you for contacting Mearto with your appraisal inquiry.
These vintage accordions are lovely but unfortunately, there is not much of a market for them, regardless of condition, form or history. I've checked recent prices here (https://www.liveauctioneers.com/search/?keyword=castelfidardo%20accordion&page=1&pageSize=24&sort=-relevance&status=archive), which has been useful in determining the value for this.
Based on the photos and information provided, and subject to examination, this is:

A vintage Paolo Soprani ivory and mother-of-pearl accordion
made in Castelfidardo, Italy, circa 1930s-40s
with original fitted case
(DIMENSIONS)
CONDITION: not examined in person but appears to be in good condition
PROVENANCE: acquired in the 1940s
$200-300*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, and thank you again for using Mearto.