Types of concertina
Concertinas - a beginner's guide
This page is intended for people who have inherited a concertina, found one in the attic, or seen one in a junk shop.
All concertinas are not alike. There are three different playing systems, for a start. They may have 6, 8 or even 12 sides. And they can cover a wide variety of musical ranges, from bass to piccolo. So use the pull-down menu to explore the differences, and to get a very rough idea of what your instrument is worth.