Note
QST, Jan 1980, p. 201.
QST, Nov 1980, p. 121.
QST, Feb 1982, p. 153. (MFJ-102)
The MFJ-101 and 102 are outwardly identical. The difference is that the 102 is switchable between a 12 and 24 hour display, includes selectable a seconds display, and includes an ID timer.