Fritz Gellerman sent me copies of the original Wurlitzer scale sticks.
The tracker bar and scale is the same as the APP [Automatic Player
Piano] rolls as well as the Style 165 band organ rolls.  The tracker
bars differ only in the drum hole offsets.  I have seen all sorts of
variations on "original instruments."  The spacing is 0.1227 inch which
is really close to pi millimeters at 2.5 digits of accuracy.

The Caliola scale is transposed 1/2-step from the APP in that the bass
pipe of the Caliola is actually marked F, but is tubed to tracker bar
port 27 which is E.  Notes below this are octave coupled.

On the old APP scale stick the Caliola scale is marked between port
15 (E) and port 58 (H).  Ports 59 through 71 are marked chimes.
There are two scales which Matt Caulfield identified as written on the
original mastering paper; both anchor the scale on F, which is rather
large.  One scale is marked original for Caliola: this one marks Middle
C (m.c.) as port 34 which is (H) on the scale.  On the second scale
this is marked c'.

It is interesting to note that the scale from the factory uses the German
notation.  There is a lot of transposition happening here.  I think the
more readable scale is the one for the APP; both show the word "pipes"
stretching from the top of the scale down.

It should also be noted that at the end of production most of the 165
and above were converted to this scale.  Tom Grace, Bill Black and Matt
Caulfield have identified that rolls marked "Caliola" are identical to
APP rolls.

The registration on this APP scale is quite convoluted.  I have the
tubing diagram from Vestal press.  We are talking major multiplexing as
the scale can control two ranks of pipes, bells, chimes and xylophone,
but not all at once.  Whether or not Wurlitzer used the extra percussion
on the Caliola is anyone's guess.  Don Stinson claims that they did.
There is room for a set of bells or chimes in the front below the
wind chest.

I think I have submitted the scale before to MMDigest, but attach it
again in case it is not in the Archives.

Julie Porter

 [ Thanks, Julie, I'll place the scale stick image with other APP
 [ information at the MMD Tech site, http://mmd.foxtail.com/Tech/
 [ under "Music Rolls & Tracker Bar Scales".  -- Robbie