concertina
A concertina is a bellow-driven instrument. It usually has symmetrical sides and its bellow is square, hexagonal or octagonal. Often mistakenly tagged as accordion.
* Examples:
** Square: post #1011465
** Hexagonal: post #2888534
** Octagonal: post #3114877
h4#external-links. External links
* Wikipedia article: Concertina
Aliases: none