| Hohner HA3500 Corona II 3 Key Diatonic Acordian This affordable accordion features 31 treble keys, 12 bass chord buttons, 3 sets of treble reeds and double strap brakets. Hohner’s Corona II accordion is offered in the FBbEb and GCF key combinations. Red pearl finish. Optional case available. Features | | red | | | A/D/G, G/C/F, F/Bb/Es | | | 31 (3 rows) | | | 62 diatonic | | | 2 | | | 12 | | | 2 | | | 31 x 19 | |