VINTAGE TAXCO? 925 STERLING SILVER PEARLS AND ONYX NECKLACE TESTED

VINTAGE TAXCO? 925 STERLING SILVER PEARLS AND ONYX NECKLACE TESTED Item specifics: Seller Notes: “Excellent vintage condition. No issues. Has been in storage.” I can't read a stamp. It seems that it is TAXCO. Gender: Women Material: Metal, Stone Featured Refinements: Sterling Silver and Onyx Round Beads Necklace Main Stone: Onyx Country/Region of Manufacture: Mexico? Metal: 925 Silver Years of Manufacture: 1950-60s? Brand: TAXCO? Diameter of the beads: 8 mm Weight: 51 g Clasp Shape: Box Clasp Length around the neck: 50 cm (19.7 inches) Amount of Beads: Silver: 29 Onyx: 28 Spots appear in the photo is a result of light reflection. I will be glad to answer all your questions. Thank you very much for looking!