Note
QST, Apr 1960, p. 126.
The six volt units appear to have been dropped fairly quickly.
Review: QST, Aug 1960, p. 43.
ReviewL CQ, Aug 1960, p. 73.
Models:
C314: 6 m / 6 VDC
C319: 10m / 6 VDC
C315: 6 m / 12 VDC
C316: 10m / 12 VDC
C318: 6 m / 12 VDC / 120 VAC
C317: 10 m / 12 VDC / 120 VAC