For those interested in Bay Area radio history, the Bay Area Radio Museum
http://bayarearadio.org/site/ has a 1964 air check of (Fred) Van Amburg on the pre-Drake KFRC. At the time, KFRC was trying unsuccessfully to compete in the MOR arena with KSFO and KNBR, much as its RKO General sister station KHJ was getting its clock cleaned in LA at the same time by KMPC and KNX.
Amburg was most famous - some would say
infamous - for later (70s and 80s) losing the "Fred" and being the top-rated anchorman on KGO-TV's
NewsScene, known for teaser headlines like
"Penis found on railroad tracks. Details at 11:00."
But in 1964, "Van" was still toiling away in relative obscurity on KFRC. Much like the KSFO air check mentioned by Michael, there were practically no jingles (maybe one or two slow sleepy ones), and almost no mention of call letters, or anything we associate with "stationality" these days, or with Top 40 stations even in those days.
In fact, the whole air check is so sleep inducing and boring, it was hard listening all the way through.