Sounds like the "tank set" that went complete for $45 at "Marine Supply",
Anacortes, Wa 1949. (new in sealed boxes. antennas, headsets, keys,
dynamotors, tuners, and wow!) I have the key (s-38) that's all! (gift from
friend, surplus store at an AFB near Sacramento. We used some of the "tank
sets" as mobile radios and field day sets in the late '40s and early 50's.
Lynn, W7LTQ