Tested with the 1st grade neck brace (i.e. 950/1000)... And their crystal glass blown in royal blue from SÈVRES...
In beautiful condition with no lack, just slight deformation and oxidation on metal and crystal...
A refined and classic model...
I haven't found the goldsmith's mark...
Without it is undoubtedly a goldsmith from PARIS - FRANCE...
From the mid-19th century in the spirit of the 18th century...
Weight... 324 gr