Friday’s ad is for Carling’s Red Cap Ale, from 1950. In this ad, part of another series featuring well-known celebrities of the day and the tagline “x person, too, has graduated to Carling’s — the LIGHT-HEARTED ale!,” it features “American actress and singer” Ethel Merman wearing an Oxford cap, or mortarboard, with a small red cap on top of it while holding up a glass of Red Cap Ale.