The 'C' couronné poinçon was a tax mark employed on any alloy containing copper between March 1745 and February 1749.
With their swirling arms, acanthus-cast backplates, and differing drip-pans, one of which is in the shape of a daisy, these wall lights relate closely to a pair depicted on plate 8 in André-Charles Boulle's Nouveaux dessins de meubles et ouvrages de bronze et de marqueterie, see H. Ottomeyer and P. Pröschl, et al, Vergoldete Bronzen, Vol. I, München, 1987, p. 61, fig. 1.9.4. Engraved by Mariette and published in circa 1724, this folio illustrates the great variety of furnishings and decorative ormolu object the Boulle workshop was able to produce for its wealthy clients. The presence of the 'C' couronné poinçon is a curious feature of this lot as it would date these wall lights to between 1745 and 1749; a period when these bras de lumière would have been considered out of fashion. It is possible that they were struck with the tax mark because they were sold by a marchand-mercier during this four-year period.