Thursday’s ad is for Carling’s Red Cap Ale, from 1951. 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, comedienne, model, film-studio executive, and producer” Lucille Ball wearing an Oxford cap, or mortarboard, with a small red cap on top of it while holding up a glass of Red Cap Ale. “She was best known as the star of the self-produced sitcoms I Love Lucy, The Lucy–Desi Comedy Hour, The Lucy Show, Here’s Lucy, and Life with Lucy.”