A1000 Tankmouse with angle
A2000, 500, 500+ Tankmouse
A3000 Pregnant mouse
Early A600 Tankmouse with lighter color
Later A600 Rounded with left button bigger than the right
A1200 Rounded with left button bigger than the right
A4000 Rounded with both buttons same size
Thats what I've experienced but I'm sure there's more combinations since as said already, Commodore wasn't afraid to mix things up if needed.
