Each oil pump is decorated in a different design: a cowboy riding a horse; a green-eyed, red-nosed skunk complete with white stripe. The slowest pump in the field, quite naturally, is a turtle.

Ulysse Nardin's new Hourstriker Oil Pump is a $100,000-plus timepiece with oil derricks on the dial. It is not that often that people wear luxury items that explain to others how they afforded ...