Note
QST, Jun 1962, p. 140.
QST, Nov 1963, p. 150. (Model 102A announced)
QST, Dec 1963, p. 170. (Model 102A)
QST, Jan 1964, p. 162.
QST, May 1965, p. 173.
QST, Feb 1966, p. 141.
QST, Apr 1966, p. 148. (Model 102C)
Model 101 appears to consist of two discrete units, the switch (the small box with the tube) and the preselector.
Model 102 is describes as an "integral unit," presumably the switch and preselector are in the same box.
Review (model 101): QST, Jan 1963, page 49.