The Hague, Dutch Republic · d. 1659 (birth year not established in sources consulted here)
Salomon Coster
VerifiedPendulum clock construction
Life & work
Salomon Coster was a Hague clockmaker who built the first working pendulum clock to Christiaan Huygens's design in 1657, following Huygens's mathematical and mechanical concept for applying a pendulum to regulate a verge clock escapement. Huygens obtained a States of Holland privilege (a period patent-like protection) for the design, and Coster, as the maker, held related manufacturing rights under their arrangement; several surviving early pendulum clocks from 1657–58 are attributed to the Coster workshop, made in close collaboration with Huygens as the clock progressed from concept to refined production over roughly a year.
In September 1657 Coster entered into a notarised contract with John Fromanteel, son of the London clockmaker Ahasuerus Fromanteel, understood by historians as having enabled the Fromanteels to learn Huygens and Coster's pendulum-clock methods and bring the technology to England — a documented episode (the 'Coster–Fromanteel contract') that is itself a significant, well-studied event in the transmission of the pendulum clock across national horological traditions, though its precise commercial and personal motivations remain, in the words of specialist historians who have studied the surviving notarial document, incompletely understood.
Coster's role illustrates a recurring pattern in horology's history in which a scientist-designer (Huygens) worked through a skilled practical clockmaker (Coster) to realise and manufacture an invention, a division of labour paralleling, for example, the relationship between the marine chronometer research programme and its practical makers in England a century later.
Timeline
Salomon Coster's recorded dates, dated events from this profile and its sources, and dated pieces and sales from the object catalogue. Dates are as each record gives them.
1656 · Career
Built the first working pendulum clock to Christiaan Huygens's 1656–57 design
1657 · Career
Salomon Coster was a Hague clockmaker who built the first working pendulum clock to Christiaan Huygens's design in 1657, following Huygens's mathematical and mechanical concept for applying a pendulum to regulate a verge clock escapement.
1657 · Career
Huygens obtained a States of Holland privilege (a period patent-like protection) for the design, and Coster, as the maker, held related manufacturing rights under their arrangement; several surviving early pendulum clocks from 1657–58 are attributed to the Coster workshop, made in close collaboration with Huygens as the clock progressed from concept to refined production over roughly a year.
1657 · Career
In September 1657 Coster entered into a notarised contract with John Fromanteel, son of the London clockmaker Ahasuerus Fromanteel, understood by historians as having enabled the Fromanteels to learn Huygens and Coster's pendulum-clock methods and bring the technology to England — a documented episode (the 'Coster–Fromanteel contract') that is itself a significant, well-studied event in the transmission of the pendulum clock across national horological traditions, though its precise commercial and personal motivations remain, in the words of specialist historians who have studied the surviving notarial document, incompletely understood.
1657 · Career
Party to the 1657 Coster–Fromanteel contract, a documented episode in the transmission of pendulum-clock technology from the Dutch Republic to England
1657-1659 · Catalogued piece
1659 · Career
Died
Training, contributions & innovations
- Built the first working pendulum clock to Christiaan Huygens's 1656–57 design
- Held Dutch manufacturing rights associated with Huygens's pendulum-clock privilege
- Party to the 1657 Coster–Fromanteel contract, a documented episode in the transmission of pendulum-clock technology from the Dutch Republic to England
Inventions & patents
- The pendulum clock's underlying design is credited to Huygens under a States of Holland privilege; Coster's role was as the executing craftsman and licensed manufacturer rather than as the design's originator, a distinction the surviving historical record supports clearly.
Signatures & markings on surviving work
- Early Coster-made pendulum clocks (1657–59) are held in institutional collections including the Science Museum Group (UK); signatures and precise attribution of individual surviving examples should be checked against the specialist Antiquarian Horology research (Hordijk and Memel, 2021) rather than assumed uniform
Collecting significance
Surviving Coster-made pendulum clocks from 1657–59 are exceptionally rare, museum-grade objects of foundational importance to the history of timekeeping; no meaningful private collecting market exists for authentic examples, and any claimed example outside an institutional collection would require extraordinary provenance verification.
Firms, key models & movements
No firm, model or movement in this encyclopedia is yet recorded under this maker's name.
In the object catalogue
1 catalogued object is recorded under Salomon Coster. Attributions are as given by each source and are not independent authentication.
- Early pendulum clock by Salomon Coster, c.1657Wall clock · 1657-1659
Provenance
Where the 1 catalogued piece by Salomon Coster was recorded, with the collectors, owners and sales their records name.
Provenance map
Each piece is linked to the museum, auction house or dealer whose record it comes from, and to any other house or collection its own provenance names. Select a name to see its pieces.
Museums · 1 piece
Science Museum Group
Museum · 1 piece
Early pendulum clock by Salomon Coster, c.1657Wall clock · 1657-1659 · Record source
The record names no sale, lot or earlier owner.
Each line is copied from the object's source record and is not independently verified. Holders are as recorded when the piece was catalogued: museum objects may not be on display, and sold lots have since changed hands.
Photographs
Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.
Sources & references
- Hordijk, B. and Memel, R., 'Salomon Coster, the clockmaker of Christiaan Huygens,' Antiquarian Horology 42(3) (September 2021), pp. 323–344
- Science Museum Group Collection, curatorial record for the early Coster pendulum clock (c. 1657)
- Kats, F. (compiler), documentary materials on the Coster–Fromanteel notarial contract (antique-horology.org)
Where sources disagree, the disagreement is stated rather than resolved silently.