Got this from an charity auction for $200. Its a Soprani/Tivoli as marked on the instrument, but itd be great if the experts here can provide more insights on the age and other info on this model. Turns out this accordion is mostly working fine, except some air leaks. Some weather seal from Home Depot along the bellows edge reduced the leak to accept level for me. The button switch is kinda cute. This is a 4/5 LMMH without chambers. The action is good. I am keep it open to rid of the old odor as much as I can. The volume is moderate (air leak probably didnt help either), but the sound is quite sweet and pretty, even the bass side doesnt sound heavy and nasty like some others Ive heard. I have another Paolo Soprani 4/5 120 bass PA with single tone chamber from LibertyBellows(from the 1950s according to the boss of LibertyBellows). It also sounds quite sweet with clarity but quite a bit louder in volume than this one. Is this one older than the 1950s? Was the button switches popular at the time? These little button switch looks cute but functionally not as good as the modern switches, slower to switch and harder to tell apart when in a hurry. My two cents. Would love to hear from the experts here. Thanks in advance!