[Milsurplus] Wanted: Change 1 to TM 11-5820-334-35 (R-392/URR)

[Hue Miller]

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US Army Signal Corps RCA Radio Receiver 348-Q! Item number: 130088544157

What does the marking on the cabinet " 71ST TCS " mean?
Does this imply some kind of AAF ground use?
-Hue Miller