Christian Tedesco hopes to identify an unknown pipe organ roll player cabinet
in Argentina [210304 MMDigest]. Without the music rolls, the next best aid to
identification is the tracker bar.

The tracker bar image at the link below was captured using a flat-bed image
scanner, such as found in an office computer printer-scanner. Another capture
method is to use a digital camera or iPhone mounted on a tripod. A long scale
is placed adjacent to the tracker bar; it can be ruled in Imperial (inches)
or metric (centimeters) or both.

The tracker bar of this example is readily identified as a 9-holes-per-inch
88-note tracker bar that plays "standard" or "American" piano rolls, with some
added features:

1) the central ports for the playing notes are spaced at 9 holes-per-inch;
2) Bass and Treble "Theme" ports are reduced height and almost twice width;
3) an oversize square port on the Bass (left) side is for the Loud Pedal;
4) narrow, tall slots at the extreme left and right are about 11.25" apart and
will be partially covered by the music roll to control a roll tracking system.

If this tracker bar, or a similar "piano roll" tracker bar of 9 holes-per-inch
and 11.25" width were used in a music roll cabinet connected to a pipe organ,
the companion music rolls might be (a) Reproduco piano-organ or (b) Wurlitzer
Style RS or Concert Organ rolls.

If the holes are at 6-holes-per-inch and tracker bar is 10.125" then the music
rolls played might be (c) Aeolian "58-note standard organ" rolls. Ref.
https://www.mmdigest.com/Gallery/MMMedia/identifying.html 
and http://www.maesto.com/US/identifyingrolls.html 

If the roll player has a tracker bar for European music rolls then many more
music roll styles are possible. A good photograph of the tracker bar _with an
adjacent scale_ will be a big help to identify the player system.

Robbie Rhodes
Etiwanda, California

 [ TB_88n_unknown.jpg (478 kb)
 [ https://www.mmdigest.com/Attachments/21/03/12/210312_022235_TB_88n_unknown.jpg