Men’s vintage silver toned cuff links with cz stone!

I got these from an estate and thought they were the coolest thing!Vintage, maybe 1960s-70s silver toned cuff links.They measure to be 16x21mm in size each.Marked PAT 2,974,381Do show a little sign of wear.gemstone, 14k, 10k, 18k, sterling, silver, gold, estate, ring, pendant, earrings, loose, natural, stone, genuine, synthetic, lab, diamond, moissanite, vintage, real, gemstone jewelry, engagement, anniversary, promise, wedding, plated, gem, necklace, brooch, fire, crystal, jewel, gift, authentic, collectable, affordable, tested, luxury, natural, opal, emerald, aquamarine, topaz, sapphire, tourmaline, zircon, spinel, investment, ruby, alexandrite, stamped flawless for everyday use. supreme materials and excellent craftsmanship ensure long-lasting durability.