It was in the 17th century that the concept of the magnetic clock was conceived by Nicolas Grollier de Servière, which inspired Maurice Coüet to make a series of three clocks that work through magnetism. He placed a rim of a small basin edged with numerals on top of the base and would fill the basin with water, a floating figurine will then slowly move around the edge and would point to the right time on the dial. The concept of a magnetic clock is that the movement is laying horizontally in a box or base beneath a pewter dish and drives a magnetized disk, which makes a complete rotation every twelve hours. On it there two magnets, one north pole and the other south pole. The turtle has a little steel needle magnetized to the north and south pole and they are placed in such a way that the turtle floats in the water and is drawn between the two magnetized poles. The turtle’s head points to the numerals on the engraved dish, the turtle then follows these magnets in rotations. The present magnetic table clock was made by Cartier in New York in the late 1920’s. The clock is fitted with the largest base known to exist of all Cartier magnetic clocks and was purchased by an important esteemed Asian collector directly from Cartier in 2008. The clock is in beautifully original condition and can be classified in the mystery clock league because not being familiar with the magnetic system, one may never figure out how the turtle swims around the basin.