Dating from the 1910s, this early platinum, seed pearl and diamond wristwatch was created by Cartier Paris in collaboration with Edmond Jaeger and European Watch & Clock. The square case with rounded corners , marked EJ for Edmond Jaeger, encloses a silvered dial with Roman numeral indicators and blued hands, case and geometric lugs enhanced with millegrain accents, and rose-cut diamond winding stem, approximate total diamond weight 3.50 carats, enclosing a signed European Watch and Clock Co. 19-jewel movement with 8 adjustments, joining a mesh band of platinum and seed pearl links, completed by a platinum and 18K gold deployant clasp set with rose and old European-cut diamonds. A great early Art Deco design from a visionary firm, this period wristwatch is a refined and historic piece of watchmaking history.