Oscar Schmidt OS21C Diatonic autoharp in keys of Eb & Bb, with semi-hard shell case.
This is an American made late 1970s to early 1980s autoharp which has had fine tuners installed. It's in good condition for an autoharp of that age. It is missing a tuning wrench and a 2.5mm hex fine tuning wrench.
American made autoharps are sought after, and this instrument has fine tuners as well. Play it as an Eb Bb diatonic, or convert it back to a full chromatic instrument.