It was definitely '87, that's when they did the rebrand, ditched the logo we both use for our avatars, and brought in Dan Gray (who is clearly amused by Santa up there). Cheap is right- that KCOP knock-off logo wasn't introduced until later, initially it was just "KOVR 13 NEWS" in a bold, italicized version of the font CBS News used for lower thirds, odd for an ABC affiliate but perhaps foreshadowing its future as a CBS O&O?
And speaking of lower thirds, during the initial period of that set, while using the CBS-style font, the lower thirds were ginormous- almost like lower halves!