Jacques Helft, Le Poinçon des Provinces Françaises, 1968, illustrates the marks of this écuelle (no. 1082) but dates them incorrectly. The date is indeed 1778 and the maker's mark that of Johann Friedrich Fritz, whose death is recorded on 1771, but whose mark has obviously been used later by his widow, as exemplified by a pair of candlesticks in the Musée des Arts Décoratifs, Strasbourg (catalogue, 1978, no. 112).