Photos and info courtesy http://www.larriedee.net/Shore-Roller-Drome.html

The Colonel Bogey March (Mid-60s) This was a 1964 Conn 645 Theater Organ with slightly detuned tibias to give a chorus or "whistling effect. Achieved by the tibia and and the flutes ranks a few cents apart. Also had a real amplified Glockenspeil. This was a large rink and had about 6 Conn Leslies and four other Conn speakers hooked up for effect. Very impressive in a skating rink in the Twin City area of Minnesota. I loved playing this setup.