
(Photograph courtesy of Art Reblitz)
Early style control knob below the coin
entry chute on front of Seeburg B #44,649, made in 1911. This
knob is for setting the mandolin attachment to stay on, off, or
to work automatically from the music roll. In early
keyboard-style Seeburg A roll pianos with a rank of pipes, such
as styles E and F, a second knob of this type is located under
the keybed, for controlling the pipes.
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
(Photograph courtesy of Art Reblitz)
In early style K cabinet pianos, two knobs
for controlling mandolin attachment and pipes are commonly
located on the right side of the case, near the front. (Seeburg
style K #53,997, made in 1913.)
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