- French hallmark of boar's head title 800/1000 in use in France from 1838 to 1962 present on the necklace's hanging ring and on the necklace's chain (photo number 9).
- Diamond-shaped goldsmith's hallmark present on the necklace's hanging ring partially erased and illegible.
- Spring of the necklace's hanging ring in good condition and functional.
- Period late 19th century around 1880-1900.
- Net weight: 24.22 gr.