Jacob & Co Caligula

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Jacob & Co Caligula

Of all the examples on this list, the Jacob & Co Caligula erotic watch is the most covert, as a 180-degree rotation of its bezel is required to expose the naughtiness it hides. The opening in the dial rotates alongside the bezel, and once at the six o’clock position, an artsy automaton of a ménage à trois becomes visible—its motions controlled by the piece’s secondary crown. With its sexual exploits under cover, the sleek white- or rose-gold timepiece could be mistaken for any other fine work of haute horlogerie, especially when you take a moment to appreciate its finely executed guilloché dial. It is priced at $69,000 for white-gold and rose-gold versions, without the diamond setting. (jacobandco.com)