I've been reading through 1963 issues of the San Diego Union, noting how differently radio was done way back then (for example, DJs routinely working six-day weeks rather than a straight Monday-Friday).
I'm guessing KPRI-FM was doing the Beautiful Music format at the time, judging from the program titles in the newspaper: "Morning Moods," "Music for Mothers" and "KPRI by the Sea." As an old radio junkie, I wish I could hear some of that, though I doubt I'd have tuned in very often.
Hoxie:
Yep. KPRI was "Capri by the Sea" until it started playing album rock in the late 60s. If you heard the KFMB-FM aircheck I linked, you've pretty much heard the Beautiful Music format. There really wasn't much innovation in how it was done from station to station, market to market or even decade to decade, apart from the slight modernization of the music.
Radio was a six-day gig even for big-time personalities in major markets. It really wasn't until the 80s or later that it changed. Usually, weekend shifts were longer than weekdays, so you could make it work with a sixth day from your weekday people, plus one or two weekend/utility jocks. Example:
Saturday:
12:00 am-6:00 am: Weekday overnight talent
6:00 am-11:00 am: Weekday morning talent
11:00 am-4:00 pm: Weekday afternoon talent
4:00 pm-9:00 pm: Weekend/utility jock 1
9:00 pm-2:00 am: Weekend/utility jock 2
Sunday:
2:00 am-5:00 am: Off air for transmitter maintenance
5:00 am-9:00 am: Religious programming (often board-opped by the maintenance engineer)
9:00 am-2:00 pm: Weekday midday talent
2:00 pm-7:00 pm: Weekday evening talent
7:00 pm-12:00 am: Weekend/utility jock 1 (usually board-opping 2 or 3 hours of public affairs programming at 9:00 or 10:00 pm)