Note
QST, Apr 1932, p. 78.
QST, Oct 1932, p. 77.
QST, Nov 1932, p. 83. (a list of all the variations)
R9, Feb 1933, p. 32.
Note that the "Royal" brand is made by Harrison Radio Company. See Radio Craft, Mar 1932, p. 555.
Available in three models:
Star (also called RP): two tubes, battery, $13.95; AC. $23.52
Chief: three tubes, battery, $16.95; AC, $26.46
Olympic: with an additional stage of audio, battery, $19.95; AC, $29.40
Available as a kit or fully assembled.
Ham band model cover 20, 40, and 80 meters
"Regular" model covers 14 to 200 meters, with a 550 meter coil available for 75 cents.
Appears to use the same tuning dial as the REL 278 and the Gross Hawk.