 Regal (musical instrument): Encyclopedia II - Reed organ - StopsReed organs of European and U.S. design nearly always have a split keyboard, with one set of stop controls for the bass register at E3 and below and another for the treble.
The standard European configuration of stops included five numbered drawknobs for each register:
An 8' foundation rank A 16' foundation rank A 4' reedlike rank An 8' reedlike rank A 16' soft, salacional-like rank U.S. made reed organs varied considerably in their stoplists, with the most common instruments having two complete sets of reeds and ten or more dr ...
See also:Reed organ, Reed organ - Stops Read more here: » Reed organ: Encyclopedia II - Reed organ - Stops | 
