U.S.A. (1930) Radio Amateur connection acknowledgement card. 1 cent bicolor postal card (O) from "1AVK" in South Manchester, CT with description of the operator's equipment!
AVAILABLE AT $20
U.S.A. (1930) Radio Amateur connection acknowledgement card. 1 cent bicolor postal card (O) from "2AKO" in Albany, NY with description of the operator's equipment!
AVAILABLE AT $20
U.S.A. (1931) Radio Amateur connection acknowledgement card. 1 cent bicolor postal card (O) from "2BOF" in New York, NY with description of the operator's equipment!
AVAILABLE AT $20
U.S.A. (1931) Radio Amateur connection acknowledgement card. 1 cent bicolor postal card (O) from "W2BS" in Rahway, New Jersey with description of the operator's equipment! Unusual and hard to find!
AVAILABLE AT $20
U.S.A. (1931) Radio Amateur connection acknowledgement card. Attractive 1 cent bicolor postal card (O) from "W8BXY" in Old Forge, New York "In the Adirondacks". Unusual and hard to find!
AVAILABLE AT $20
RUSSIA (1930) Radio guide*. Clock*. Postal card (O) with illustrated advertising "Radio Listener's Guide to Moscow Radio Station Programs."
AVAILABLE AT $50
RUSSIA (1930) Radio. Clock. Illustrated postal propaganda card (O). Illustrated radio guide.
AVAILABLE AT $50
BELGIUM (1946) Radio tower* emitting radio waves*. 65 centimes postal card (N) with advertising Publibel No 628: "Midland's Radio."
AVAILABLE AT $15