Vintage Omega Art Deco Tank, Rare Chocolate Patinated Copper Dial, Cal. T17Vintage Omega watches from the 1930s often blended elegance with mechanical innovation and this rectangular Tank model powered by the legendary Cal. T17 delivers both with striking character. This example features a richly patinated copper dial that plays beautifully in the light, shifting from deep chocolate brown to a lighter copper hue depending on the angle. Framed by a classic stepped rectangular case, the dial is accented with blued sword hands