This is a gorgeous Vintage Accordion Model 306 by Excelsior, made in Italy with mother of pearl finish. The keyboard (mother-of-pearl keys) measures at about 17 & 1/2″ across, 120 Bass, 3 treble switches include: Oboe, Master & Bassoon , and 2 Bass shifts. Bellows are nice and straight. Has a very rich sound. Straps are in very nice condition. Case is  sturdy, clean and has working locks with key. Physical condition of the accordion is just breathtaking for an instrument that is vintage. The accordion plays well and is in very good condition. I have owned this instrument since it was purchased new. Please review the photos on this listing as this is the exact accordion & case that you will be purchasing. A very unique find. This accordion is in very good condition and plays well as it was well cared for. If there is something you specifically need to know that is not in my description- please send a email message and I will be happy to answer any questions you may have.