Dave asked: > Is this the actual nomenclature on the set? > If so, it's important. Photos, please! Obviously this is bogus nomenclature. In the JAN nomenclature system, receiver 19 was the R-19*/TRC-1 crystal-controlled 70 to 100 MHz FM receiver...not at all a unit that could be confused with any aircraft set. There are no other R-19 units in the JAN system. Mike / KK5F