Spectra-Tone
Because the Leslie rotating speaker system was under patent, Wurlitzer had to develop their own rotating speaker for their tone cabinets. The result was the Spectra-Tone.
Spectra-Tone technology is found in multiple organs and tone cabinets. We have the following Spectra-Tone drawings scanned:
503981 (Tag, caution, for 2-speed rotating speaker)
506632 (Housing, bearing and bobbin assembly for the Spectra-Tone)
506633 (Housing, bearing and bobbin assembly for the Spectra-Tone)
506635 (Rubber liner for the Spectra-Tone)
506636 (Housing, bearing, for the Spectra-Tone)

