Engaz had his workshop in the rue Helvetius, Paris from 1800 - 1810 and then in the rue Sainte-Anne in 1820.
The model for this festive urn clock and vases has traditionally been attributed to Pierre-Philippe Thomire (1751 - 1843) or Claude Galle (1759 - 1815), and various decorative elements of this garniture appear on items executed by both bronziers. An engraving of this model clock is in the Recueil de La Mésangère, Collection de Meubles et objects de goût of 1807. An identical clock with unsigned dial was supplied to the château de Fontainebleau by Lepaute on 23 August 1806 (J.-P. Samoyault, Pendules et bronzes d'ameublement entrés sous le Premier Empire, Paris, 1989, cat. 47, p. 81), while two identical clocks with movements signed by Folin and Devillaine are in the Musée François-Duesberg, Mons, Belgium (P. Kjellberg, Encyclopédie de la pendule Française, Paris, 1997, p. 327, fig. C).