Cut-out thumb rest. year 1747. The first, marked (I.ROVX) Weight 98 gr.
The second, marked: (IACQVE SABOVRAU. 1747. Weight 77 gr
Both with the same master goldsmith. (PN, with a star topped with a fleur-de-lys)
Calais
Perfect condition.
I remain at your disposal for any information or additional photos .