Limitations of a 60 bass accordion: You probably don’t have a row of diminished chords or repetitive button notes, and you also probably only have 34 keys. I couldn’t find any sheet music written specially for 60 bass online; I don’t think that any sheet music or songbooks are available with those limitations. read more
The accordion has an awful lot of bass buttons, but don't worry, you need only four or six of them to start with. A `normal' accordion can have up to 120 basses, arranged in up to 20 columns and up to 6 rows. Above you can see the layout for a 72 bass Stradella (that's what it's called) layout. There are two bass rows and four chord rows. read more
Accordion Sizes - 12, 24, 32, 48, 60, 72, 96, 120 Bass Accordions However sometimes you can find X bass buttons with white/black keys from Y bass accordion (for example 60 bass buttons with keyboard layout from 72 bass accordion). read more