Breguet

Emailing museums in Spain in vain I was referred to the article:  The measure of time: Kings’ clocks in the eighteenth-century Spanish court (Amelia Aranda Huete, Curator of clocks, Patrimonio Nacional, 2012). There are two mentions of “sympathetic” clocks.

Chapter IV CHARLES IV, the clockmaker king page 78

In addition to this crate the lady brought a smaller crate containing “the pendulum clock that sets the time of the watch” (la péndola que pone el Relox a la hora) which the queen had commissioned from the master clock and watchmaker Breguet. This clock was to be transported to Aranjuez as the queen required it urgently. So began the commercial dealings with Abraham-Louis Breguet, who enriched the royal collection with several timepieces, especially pocket watches. Breguet was notable for the technical perfection of his movements. One of his technical breakthroughs was the creation of sympathetic clocks like this one, which the Spanish queen must have commissioned from him. These clocks were used to wind and set the time of pocket watches. (see note 332, page 136)

Note 332: The Patrimonio Nacional collection preserves a sympathetic clock made by Breguet’s firm but dated 1850; it was made in the nineteenth century by the firm’s heirs.