Sharp cookie, Richard, KPH did it correctly as the broadcast was not for everyone just certain stations, so it was CP not CQ.

73
DR

On Thu, Sep 7, 2023 at 8:13 PM Richard Knoppow <1oldlens1@ix.netcom.com> wrote:
    The only time I heard CP used was by KPH in its introduction to the
daily press transmissions. CP CP CP de KPH KPH KPH, now RCA UPI PRESS
FOR SUBSCRIBERS ON  followed by a list of frequencies. The other
stations sending the same press, KFS, WCC, WSL sent CQ.