Vintage necklase Rhinestone Black Enamel Comma Link Necklace 925 estate Sale

i found this beautiful set at a estate sale just beautiful signs of wear on back part only front in great condition has a stamp on back not very clear 925 lost some color on back only don't now much about it the earings are clip on just lost some color on back 9nly the front it's in good condition this set looks vintage please zoom in on all photos for they are part of description