As I said earlier, between 1950 and 1969 I lived in Arizona, the S.F. Bay Area and Long Beach/L.A./San Diego Ca. I listened almost exclusively to T-40 music stations (KTKT, KRLA, KFWB, KAIR, KOGO, KEWB, KYA and KOMA) and none of those were using the term "oldies" on-air. They mostly used regional geographic references such as "KYA Golden Gate Greats" and "KTKT Radio Free Tucson or Color Radio 99". Various terms were used to identify with early RnR songs but oldies wasn't one of them - at least not as a brand (and of the stations I mentioned). I obviously cannot speak for any stations which did not come in to my area so perhaps the term did exist somewhere back east but it took a decade, or most of one, to make its way west it seems. When I returned to S.F. from Vietnam in 1966 neither KWEB nor KYA identified as an oldies outlet and the automated KGO had no branding at all for 12-18 months. When I got to NYC in 1969 WABC was not branding as an oldies outlet either. Nor was WOR-FM.