This will almost certainly be designed to play Hupfeld / Animatic
rolls, which are standard themed 88-note rolls identical to Aeolian's
Themodist and, come to that, almost every European make of roll.

Hupfeld is notable for its extensive hand-played catalogue, some 5000
titles of almost exclusively classical music. Equal to the Welte-Mignon
catalogue but much less feted because of not being for reproducing
pianos. Hupfeld players have a sophisticated graduated accompaniment
system to make the most of these hand-played rolls.

Julian Dyer