The design for this clock is based on one from 1770 by Francois Vion and Pierre-Antoine Foullet (H. Ottomeyer and P. Pröschel, Vergoldete Bronzen, Munich, 1986, p.193, fig 3.11.6). Comparable pendules au lion are illustrated in Pierre Kjellberg, Encyclopedie de La Pendule Française du Moyen Age au XXe siècle, p. 278, figs. C-E.