Rare 1721 Silver Perpetual Calendar Ring Dated ANNO 1721 Unique Antique Jewelry

Authentic 18th-Century Design: A rare and unique perpetual calendar ring from the year 1721, a true piece of historical jewelry and early scientific tool. Sterling Silver: The ring is confirmed to be silver, with a natural patina showing the characteristic black tarnish of silver and the green oxidation of its copper alloy, consistent with authentic antique sterling. Functional Mechanical Parts: Features a fully intact and working design with movable bands for the days of the month and years, allowing you to set the calendar for any date. Legible Engravings: The inscriptions for months ("J.A.S.O.N.D," "F.M.A.M.J"), days (1-31), and the specific year "ANNO 17 21" are all clear and readable. Excellent Condition for its Age: The ring is in remarkable antique condition with no signs of major damage or repair, retaining the charm and character of a genuine artifact. Clear, legible engravings and a lovely natural patina, and all its original parts appear to be intact and functional.