To the contrary, Herman Band was VERY logical! How else coudl he have designed such a fiendish instrument that can play in virtaully whatever key you like, each as difficult as the other?
Pikey
(Alphonse Arnold Premier Bandoneon owner!)
To be fair there are spasms of logicality there, most of two octaves of G, A and E major across both sides are easy enough
However that does happen to coincide with the thirty button layout of the 1830/40s original, after that it does get a might confusing.
Steve
Alfred Arnold 126 tone from 1939.