1961 Kellogg's Special K Breakfast Ad - "It starts your day with important, complete protein—yet supplies fewer than 250 calories. It’s quick as instant coffee—and tastes so good you can live with it month after month"
1961 Kellogg's Special K Breakfast Ad - "It starts your day with important, complete protein—yet supplies fewer than 250 calories. It’s quick as instant coffee—and tastes so good you can live with it month after month"

1961 Kellogg's Special K Breakfast Ad - "It starts your day with important, complete protein—yet supplies fewer than 250 calories. It’s quick as instant coffee—and tastes so good you can live with it month after month"