Commonly associated with Cartier, the "Comet" clocks were manufactured between 1912 and 1920. They were invented by the talented clockmaker Maurice Couët who, as of 1912, was commissioned by Cartier with the manufacture of imaginative clocks, such as the celebrated "Mystery" clocks. Couët's first inventions were the "planet" or "comet" clocks, also designated "semi-mystérieuses".

These enchanting timepieces were usually featuring sky blue enamel dials and diamond-set hands formed as stars, moons or comet tails, poetically evoking the heavenly firmament and resembling the Islamic-style jewellery then made by Cartier.

The Goldsmiths & Silversmiths Co. Ltd. were one of the leading English manufacturers and retailers of fine watches, silver and jewelery situated at 112 Regent Street, London. In 1952 the company merged with the renowned jeweler Garrard & Co.