Jean Franois de Belle, matre horloger in 1781, specialised in mechanical clocks and may have produced several clocks for the Spanish market. One is in the collection of the Palacio Real in Madrid. Tardy, Dictionnaire des Horlogers Franais, Paris, 1971 (5th ed.), p. 41.
A closely related example was sold anonymously at Christie's New York, 8 May 1991, lot 43.