Platinum Necklace With Fine Pearls And Diamonds

Platinum necklace, hallmarked with a dog's head.
It is composed of knife-edge links interspersed with rose-cut diamonds in a beaded setting.
It is adorned with 15 fine pearls, ranging in size from 4.3 to 8.2 mm.
Thirteen are saltwater pearls, and the two smallest, on either side of the clasp, are freshwater pearls.
The invisible ratchet clasp has a figure-eight safety catch.
Length: 44 cm.
Weight: 18.6 g.
French work, circa 1900.