Puzzle Clock MKII
The second in the series of Puzzle clocks, so called because they have a hidden feature. With this one it revolved around the little drawer on the front. It is securely locked, and not possible to open without smashing the clock to pieces! Unless the secret is known, you can't open it.
Originally this started out as a little Victorian shock machine, and the drawer contained the little electrodes that you held in your hands.