An elegant, historically fascinating, and fully serviced collector’s piece: an authentic WWII-era Omega "Calatrava" dress watch, powered by the legendary 30mm movement family. This watch is a textbook example of Swiss horology during the early 1940s. True to the production methods of World War II—where movements were often stockpiled and cased as high-quality materials became available—this piece features a movement serial number (9,518,617) dating to circa 1939–1940, and a solid stainless steel case serial number (10,306,735) dating to circa 1941–1943. This historical 2-3 year gap is fully correct for the era and highly prized by collectors. • Brand: Omega • Model: Vintage "Calatrava" Style Dress Watch • Period: 1939–1943 (World War II Era) • Movement: Authentic Omega Manual-Wind Caliber 30T2 (early 30mm family), 17 Jewels. Features internal factory batch stamps under the balance wheel. • Service History: Fully serviced this year (2026). The watch is running strong, winding smoothly, and keeping very good time. • Case Material: Solid Stainless Steel ("Acier Inoxydable"). Internal caseback decorated with traditional concentric perlage finishing, fully signed by Omega Fab. Suisse. • Case Diameter: 35 mm (excluding the winding crown)—the ideal vintage dress watch proportion. • Dial: Beautiful original dial featuring applied golden Arabic numerals and hands. Positioned above 6 o'clock is the classic sunken sub-second register. The dial has aged gracefully, developing a warm, honest, and uniform golden/cream patina that guarantees its untouched, original condition. • Strap: Fitted on a matching brown leather strap with contrast stitching, perfectly complementing the warm tones of the vintage dial. • Condition: Overall excellent vintage condition. The case retains sharp lines, and the movement is clean. The interior caseback features very fine, historic watchmaker service marks, proving it was well-maintained over the decades. A superb, fully operational, and completely authentic piece of Omega’s history. Ready to be worn and enjoyed by a serious vintage watch enthusiast.