Diamonds gold convertible necklace - 1940s

18K yellow gold convertible necklace made of a series of hexagons joined together to form a honeycomb shape. It has an overlapping style with a removable "X" section with 10 round shape huit huit cut diamonds, ca. 0.20 ct, color H, clarity VS. It closes securely with two tongue closures. Hallmarked "750" and “18k".
Length 41 cm + 7 cm. Width 1.1 cm. Weight 79.2 g.
Item condition grading: **** good.