Peanuts by Charles Schulz for April 10, 1954
Transcript:
Charlie Brown looks at Linus watching t.v. in the living-room. He turns to Lucy and asks, "Does Linus like television? <br> <br> She replies, "I don't know...there's only one program that he watches..." <br> <br> She smiles as Charlie Brown asks, "What's that?" <br> <br> She replies, "Test Pattern" <br> <br>
I suppose that’s the RCA Indian-Head Test Pattern that was common in the 1950s.