Salomon Coster (c. 1620–1659) is a Dutch clockmaker of the Hague, who in 1657 was the first clockmaker to make a pendulum clock, which had been invented by Christiaan Huygens (1629-1695). Costers' earliest pendulum clocks were signed "Samuel Coster Haghe met privilege" indicating that he had been authorized by the inventor to make such clocks. John Fromanteel, the son of a London clockmaker, Ahasuerus, went to work for Coster. He was one of many foreign Clockmakers to soon make pendulum clocks following the prototype by Huygens and Coster. A contract was signed on the 3 September 1657 between Salomon Coster and John Fromanteel which allowed Frontmanteel to continue making the clocks. This clock design was heralded as a new beginning in the Clockmaking industry due to its level of timekeeping accuracy which was previously unheard of.
- Hans van den Ende, et al.: "Huygens's Legacy, The Golden Age of the Pendulum Clock", Fromanteel Ltd., 2004,
- Hans van den Ende,: "Huygens's Legacy, The Golden Age of the Pendulum Clock", Fromanteel Ltd., 2004
- van Kersen, Frits & van den Ende, Hans (2004). Oppwindende Klokken - De Gouden Eeuw van het Slingeruhrwerk 12 September - 29 November 2004 [Exhibition Catalog Palais Het Loo]. Apeldoorn: Paleis het Loo.
- Hoijmaijer, Hans (2005). Telling time - Devices for time measurement i museum Boerhaave - A Descriptive Catalogue. Leiden: Museum Boerhaave.
- No Author given (1988). Christiaan Huygens 1629-1695, Chapter 1: Slingeruurwerken. Leiden: Museum Boerhaave.