N9DEB 1939 Wichita, Kansas

Notice the handwritten address in the upper corner of this QSL - "716 So. Popular." It was the address of Frank F. Tiffany, W9DEB.
A rare N9 callsign from 1939. This seems to be a US Navy operation. Most callsigns issued in the 1930's started with "W".
It was not unusual for a HAM who was a member of the Naval Reserve to replace the "W" on his callsign with an "N" and get on the air.

QSL from the estate of W4JEI
Info courtesy of W5KNE