TE21 - What does TE21 stand for? The Free Dictionary
References in periodicals archive
The TE21 is easily distinguished by its twin headlights mounted one above the other.
Externally identical to the TE21, the 21 featured changes to the suspension, and inside the instruments were re-grouped.
Consequently, trying to convert directly to the TE11 mode will excite necessarily also the modes TE21
, TM11 and TE31.