The first image is an illustration of a watermelon on a stool and a man in a striped shirt raising a sledgehammer, with "Gallagher" written in script above the melon. Second image is of the man smashing the sledgehammer onto the stool, with pieces of the watermelon and the text flying into the air. Both images are in black on a white background.
Leo Gallagher is an American comedian who performed frequently during the 1970s and 80s. He is famous for smashing watermelons on stage as part of his act.