C. 1920 Vintage Women's 13mm Mechanical .30 ct. t.w. Diamond and Simulated Sapphire Watch in Platinum. Size 7

PLATINUM: A rare precious metal cherished for its longevity and strength. Platinum is naturally white, durable, dense, and resilient to discoloration. Most platinum in jewelry is at least 95% pure since it does not require alloys or plating.

GOLD FILLED: A sheet of gold that is bonded to a base metal through a process of intense heat and pressure. It is strong, durable and resistant to tarnish. Unlike gold plating, law requires that gold filled jewelry be at least 5% karated gold.

Diamond: The hardest and most brilliant of all gemstones, a diamond can make the heart race with its pure and fiery spark. An ancient symbol of love, a diamond is the preferred gemstone for tokens of affection, such as rings, earrings, necklaces and bracelets. Diamond is the birthstone for April.

SINGLE-CUT: A gemstone cutting technique that dates back to the 1300s. Still used today, the single-cut usually features 18 facets that go in one direction without crossing each other.

Color Grade G-H: Near-colorless

Clarity VS2: Very slightly included. Inclusions are observed with effort under 10x magnification, but can be characterized as minor.

CLARITY SI1: Slightly Included. Inclusions are noticeable under 10x magnification.

SYNTHETIC SAPPHIRE: A gemstone that is created in a laboratory to mimic the actual properties of a natural sapphire. Commonly known as "created sapphire," it features the same deep color and transparent sparkle, but is significantly more affordable than a sapphire found in nature.