Todd, see http://www.bouwerskontakt.nl/documentatie-publicaties.htm  As
far as I gather from this site, they have two versions:

  Kistdraaiorgel (bouwbeschrijving, De Vries), item no. 9403

  Small Barrel Organ (Building Instructions, J. de Vries), 2005 ed.,
  item no. 9404

The second item must be a translation of the first.  Your best bet is
to email info@huismuziek.nl.geentroep [delete .geentroep] and confirm
this with them.  You should be able to write to them in English, but
should they not understand, send me a copy of your email and I will
translate it for you into Dutch.

Regards,
Ren