Basically there are two different types of concertina: the
"Anglo-German Concertina" produces two different
notes with one button, depending on whether the instrument
is squeezed or pulled (similar to a harmonica).
In the case of the "English Concertina" the note
is the same. Thus the two instruments are played very differently.
Besides these two basic types there are also various types
of Duet Concertinas.
Whether in the elegant English drawing rooms of the turn
of the century, in the shows of the English Music Hall, in
the circus or in folk music, the concertina has always been
a popular instrument. It is small and lightweight, has a full,
rich sound and is easy to learn.