Hi Group, The "1929 Wurlitzer Military Band" catalog has the following
to say about the light bulbs:
"To further set off the organ, the decorative front is wired for
thirty-four 16 C.P. lamps, with an additional red lamp in each drum.
These lights are usually furnished in red, white, and blue colors,
and the organ makes a wonderful display at night."
Jack M. Conway, Los Angeles, California, USA
[ See, for example, http://www.aamsco.com/Antique_1920.htm
[ and http://www.lightbulbsdirect.com/page/001/CTGY/Antique
[ -- Robbie