Looking for Mortier dance organ restoration help.  In the front lower
belly of the organ, just in front of the feeder bellows and outside the
main chassis, is a single rank of stopped flutes that are unfamiliar.
They are one of the ranks individually tremed with the pouches on the
back of each pipe.

As a stopped flute, they stand anywhere from 6 to 16 inches high and
are on melody.  2/3rds up the front of the pipe is an oblong cutout
with a divider down the center.  This is currently covered with 6 to
7 thousands of an inch thick brown paper.  This is fully capped with
a cover, having a similar divider down its center, the sides having
relief to allow some vibration.

I am familiar with the "vibratones" that have foil and an open round
cutout; I have a rank of these up in the main chest pipe section.  The
organ also has a rank of the typical Jazz flutes.  Anyway, I only get
a basic flute sound from these pipes, which doesn't make sense.  The
paper was somewhat bowed and not flat.  I removed one paper and
installed several different types of covering.

With 1-thousandth-inch-thick aluminum foil I did get a decent "buzz"
much like a vibratone, but I had to remove some cardboard spacers that
had been placed on the top and bottom of the cover so that the center
dividers nearly touched.  I am thinking that a previous restoration
converted these to straight flutes, after giving up trying to make them
speak as originally designed.

Can anyone tell me the name and proper diaphragm material for this
rank?

Dick Leis
New Port Richey, Florida