See Peter Hughes, The Wallace Collection Catalogue of Furniture, Vol. III, London, 1996, p. 1311, cat. no. 265 (F83) for a very similar but not identical chandelier by Caffieri, engraved Caffieri Paris/1751.
Another 19th century copy of this model chandelier sold Christie's East, 28 April 1999, lot 378 ($81,700).