Hi Alan, thanks for sharing your music box disc, where a bit is
missing at the end, unfortunately. It is the "Funeral March" by
Chopin (Regina #1342), but the 2nd part of this march, and very
fast. Listen here as comparison:

https://www.youtube.com/watch?v=YEhDaKo-Uwc
 

The key and the speed are different to yours: G-flat major like most
Reginas in this size, yours is in A major like 15-1/2" Polyphon.

Best collector's regards from Jochen in Marburg/DE, also known as
Jochen Kopf.

Jochen Schäfer