Electric Specialty B212.5 motor #49162, from an upright Aeolian player. (Pete Knobloch)

Emerson 7361MS motor #575199, labelled Marquette Piano Company,
installed in Cremona nickelodeon. (Robbie Rhodes)

Emerson motor installed in a Western Electric dog race piano. (Pete Knobloch)

Holtzer-Cabot QS15 motor #602342, possibly from Welte or Recordo. (Pete Knobloch)

Holtzer-Cabot QS15 motor #602342, possibly from Welte or Recordo. (Pete Knobloch)

Holtzer-Cabot ST16 motor #554023, from a Steinway Duo-Art 6' 5" grand piano. (Pete Knobloch)

Holtzer-Cabot ST16 motor #625226, from a George Steck Duo-Art 5' grand piano. (Pete Knobloch)
 
 

Holtzer-Cabot ST17 #546523, from Ampico A 5' 4" grand piano (Pete Knobloch)