In December 1993 I wrote to Herbert Juettemann about the Carl Frei
organs and scales in his book in which some information is not correct.
He will use my remarks in the reprints of his book.

The first 72-key Carl Frei organ with only Undamaris as a countermelody
register was De Sik, delivered in 1932, 4 years after the first 67-key
organ, De Vierkolommen, now in Holland, Michigan.

In 1934 Carl Frei built his first two organs with Biphone registers,
one with 90 keys (De Hindenburg, Holvoet) and one with 72 keys (De
Bloemenmeid, Van Jaaren).  Both organs have two Biphone registers,
one in the melody section and one in the countermelody section.
De Bloemenmeid is the only 72-key Carl Frei with two Biphone registers.

There is only one 72-key Carl Frei organ with only a Biphone register
in the countermelody section: that is De Puntkap, built in 1937 for
Pluer.  So all the other 72-key Carl Frei organs have only one
countermelody register: Undamaris.  These are:

  De Sik (Van Jaaren, 1932),
  De Duif (Van Jaaren, 1933),
  De Pruik (Van Jaaren, 1933),
  De Tiet (Van Jaaren, 1934, now in Holland, Michigan),
  De Stolwijker (Van Jaaren, 1936), and
  De Blauwe Gavioli (Van Jaaren, 1937).

The Carl Frei scale in Juettemann's book is correct, apart from keys
71 and 72.  They were not used.  "Flute 4'" has never been a Carl Frei
register.

In the original 67-key Carl Frei scale, key nr. 47 was used for
separate cymbal instead of connected to key nr. 1 (bass drum + cymbal).
Keys 59 through 65 (7 keys) were used in the 67-key scale for
countermelody.

In the 72-key organs the countermelody was extended to 12 keys, where
key 66 is the highest G and key 67 the lowest G.  Key nr. 70 was used
in the same way as key 43.

I hope this information is of some use to you.

Best wishes,

Rein Schenk
Leverancier van draaiorgelcartons - The only address in the Netherlands
for guaranteed original Carl Frei Music