Purchased from a couple in Wisconsin (September 2022), who bought it fifty years ago when living in Boston. They say they've never had the bellows worked on, which presumably means a previous owner (whoever between 1887 and ~1972) had them worked on, albeit it sounds like neither they nor their extended family ever actually learned to play it, so its usage during those 50 years would have been limited to dabbling. Either way, the bellows appear to be working just fine at the moment. All notes are sounding and other than a few key-squeaks, buzzing, and a broken Vox Humana linkage (since repaired), it appears to be in very good shape and, if not actually maintained, at least never neglected nor stored poorly.