Set of three changer scales. It includes : - Jacques Blanc, active in Lyon from 1668 to 1702 (date of his departure for Geneva). Brass weight and beam. Wooden case annotated by hand "Belongs to moy Jean François Campiche Conseiller de Ste Croix purchased in 1690"; - François Le Goix, active in Paris 1696 to 1722. Steel flail, bronze square weights; - A l'I Couronné, rue Saint-Denis, n°77 à Paris, Cheville Père, Md, Balancier-Ajusteur, active from 1798 to 1811. Steel flail, wooden foot, bronze bucket weight stack. Label glued to lid. Length : 17 cm