Bugari piano accordion with midi (now sold). Professional Bugari accordion, cassotto chamber, 37 key, 120 bass. Scottish tuned, three voice musette plus octave reed (LMMM), 11 treble couplers plus master palm coupler, 5 voice bass with 5 couplers. This instrument is unusual in that it has 37 keys but 120 bass. The 37 keys make it just that bit more compact than 41 keys.