These type of pins were worn to close the shirt and not to adorn the tie. **
Work from the beginning of the 19th century.
Hallmarks: eagle's head, the hallmark is surely posterior to the jewel;
Goldsmith hallmark: present but illegible.
Length: 4.5 and 5.3 cm
Weight: 1.8 gr
Very good state
In a case
** Balzac evokes this practice: "the father Goriot wore on his sleeping crop two pins joined by a chain and each of which was mounted with a large diamond"