The English concertina is a member of the concertina family of free-reed musical instruments. Invented in England in 1829, it was the first instrument of what would become the concertina family.
Lachenal metal-ended English concertina.
English concertina player using all four fingers to play notes
Accordions are a family of box-shaped musical instruments of the bellows-driven free reed aerophone type. The essential characteristic of the accordion is to combine in one instrument a melody section
A piano accordion (top) and a chromatic button accordion (bottom)
Eight-key bisonoric diatonic accordion (c. 1830)
A group of accordionists in Ticino (early 20th century)