This issue has variants.
This is an llustrated, comic style advertisement from P.K. Chewing Gum. Text reads in part: "Safey Sam says Don't miss out on any of the fun… Play safe! …Play this smart too! Remind mum that chewing wholesome P.K. helps keep your teeth clean and won't spoil your appetite. Ask her to keep plenty of P.K. Gum on hand—-Wriggley's P.K. Chewing Gum."