Ferdinand Berthoud (1727-1807) was one of the finest clockmakers of the 18th century. In 1766 he was appointed a member of the Royal Society of London and later a Chevalier de la Légion d'Honneur. Examples of this model, dated 1780, are in the Munich Residenz and the Château de Fontainebleau (H. Ottomeyer, P. Pröschel et al., Vergoldete Bronzen, Munich, 1986, vol. I, p. 248).
Joseph Coteau (1740-1812) was the most famous émaille of his day, creating bejewelled dials for the greatest clockmakers. Born in Geneva, he became maître-peintre-émailleur at the Académie de Saint-Luc in 1766. By 1772 he was installed in Rue Poupée in Paris.