Note
CQ, Mar 1963, p. 20.
QST, Jun 1963, p. 118.
QST, Jun 1965, p. 184. (misstated as 344)
QST, Jun 1966, p. 168.
QST, Mar 1968, p. 114. (334A)
QST, Dec 1976, p. 157.
"A" version: QST, Sep 1967, p. 129. Probably available way before this.
After 1970, this was sold under the Barker & Williamson (B&W) label.
References:
Review: CQ, Aug 1963, p. 30.