Second Hand Beltuna 120 Bass Piano Accordion Including case. I am selling this mint condition Beltuna 120 Bass Piano Accordion on behalf of my friend and client who lives abroad. So please give me a call on 01651 851503 if you are interested in purchasing and I will pass on your details to him so that he can contact you. Specification as follows: 9 Treble Registers - 4 Bass Registers - 120 Bass - 41 Treble keys which are pearlised. This Beltuna Accordion has a full midi system fitted which is in full working order. It plays and looks like a brand new one and is in mint condition. Delivery charge will have to be quoted for because of its location.