Lot Essay
Chevalier de Bethune introduced his escapement in the 1720's. It was used by Julien Le Roy and was described in Antoine Thiout's Traité de l'Horlogerie of 1741.
A small travelling clock with conforming case by Pierre Amy sold Christie's, South Kensington, 2 December 2014, lot 423.
A small travelling clock with conforming case by Pierre Amy sold Christie's, South Kensington, 2 December 2014, lot 423.