细节
An eighty-one button duet system concertina
by Wheatstone, number 34946, with nickel endplates, eight-fold bellows, 10 13/16in.(27.5cm) diameter, in a case
by Wheatstone, number 34946, with nickel endplates, eight-fold bellows, 10 13/16in.(27.5cm) diameter, in a case