In the “Good, the Bad and the Ugly”, Blondie brings Tuco on for the reward on his head. The Sheriff goes into his office with Blonde and then comes out with a wanted poster and unrolls it to showing Tuco’s his picture on it. Look very carefully and you will see that the name on the poster is "Guy Calloway" (another of Tuco's aliases?). Guy Calloway was the name of one of the wanted men that Colonel Douglas Mortimer (Lee Van Cleef) shot and killed in “For a Few Dollars More” (1965). Obviously, they used one of the posters left over from the previous film and glued a photo of Tuco on it.