Sambo, a dusky warrior in the American army, had only recently landed, and was comparing London with New York. He paused before a shop window full of watches. His gaze became fixed on a very shiny watch on a velvet cushion, on which was pinned a card bearing the words, “This watch will go for eight days without winding.”

Sambo pondered, and then walked straight into the shop: “Say, boss, will you tell how long dat darn watch will go if you do wind it up?”