Maybe they drew Marc's pennant that way to depict "the opening of the floodgates" with Mays, McCovey and Cepeda doing damage to opposing pitchers?
Both versions are beyond cool looking, and both equally scarce for pennants of that era. That stadium definitely looks better on a pennant than in-person. We called it "Candlestink" when we lived there because it was always cold and windy (even in the dead of summer).