W9GNU Radio Postcard. White card; black and red print: “Radio 9Di, Acknowledging QSO of 10/22/33 7PM, C.S.T. QSA 5 R 7, W9GNU, Waseca, Minn., Zmitter: 2-510’s Final, Xtal Control, 150 Watts Input, Receiver SW-5, Extra Ink, QSL Tks, vy 73, J.L. Tavemmer, M.D., 601 2nd Ave N.E." Postmarked 1933.
