Beginning in 1927, the call letters KGA have been used in Spokane on AM longer in than any other set of call letters. The station is still operating in Spokane on 1510 kHz. Hope you enjoy these vintage QSLs from the 1930’s and 1940’s.
QSL from the 1970’s for comparison.
Images of QSLs, except last one, courtesy of the Committee for the Preservation of Radio Verifications (CPRV) – http://www.ontheshortwaves.com/cprv.html