In "The Disc Musical Box Handbook" by Graham Webb, first published
in 1971 by Faber and Faber Limited, 3 Queen Square, London WC1, one
can find Polyphon titles for 11-inch, 15-1/2-inch (interchangeable 
with Regina discs), first series 1001-1999, second series 10001-10602,
15-1/2-inch Regina discs 1001-1997 and 10004-11361, 19-5/8-inch
Polyphon discs first series 5001-5999 and second series 50000-50999.
Of course these lists are not complete but they are very useful.

Musical greetings,
Hendrik Strengers
Delft, Netherlands