QST, Mar 1968, p. 123.
QST, Jun 1968, p. 129. (specs)
Mark II
QST, Sep 1969, p. 4.
QST, Jan 1970, p. 4. (not specifically identified as Mark II)
QST, Apr 1970, p. 131. (this looks like a blow out sale)
It isn't clear if the Mark II was ever actually sold.
