Le faux échappement de Villard de Honnecourt / Maurice Daumas.
Abstract:
A drawing of Villard de Honnecourt (13th cent.) is generally interpreted as the oldest picture representing a clockwork escapement. After making experiments, the author establishes that this is a misinterpretation due to a mistake in the drawing by Villard
Revue d'histoire des sciences T. 35 (1982), p. 43-54