Thank you for submitting your item for appraisal. This appears to be a french Selmer B flat grenadilla clarinet manufactured in 1932. In the original Selmer case which shows some traces of wear. These clarinets were popular and many have survived. The estimate is based on similar sold or offered at auction. "Asking prices" in the trade can be higher and vary. There is no measurement for the sentimental value you might attach to it.