My apologies G-I.B.
It was probably C.P. Air, TransAmerica and WardAir that I was confusing them with. It was a long time ago (about 25-30 years ago)...aah! Those were the days... Sunday afternoons in summer with my dad... access to the roof of Pier Bravo...the smell of kerosene... getting the two-fingered salute from a pair of Spantax DC-8 pilots!!!