I would suggest this is a good learner model, as the 20 button layout isn't quite as complicated as the 30+ layout.
Bastari 20 Button Concertina - Made In Italy Exellent Condition
B.S. Dulcet 8 Fold Anglo 20 button Concertina. White Buttons.. GC..
antique Anglo German 20 Button Concertina
Bastari 20 Button Concertina - Made In Italy NEEDS REPAIR
Trinity College AP-20 Diatonic 20-button Anglo Concertina Red Pearloid
