Vintage Omega Tank, Swiss Watch, Unique Leopard Patina, Art Deco Style, Cal. 20F from 1940'sThis 1940s Omega Tank is a rare survivor from the golden age of Art Deco design. Housed in a 22 x 38 mm stainless steel case, its rectangular proportions and elegant dial layout are straight out of the early 20th century playbookbut what truly sets this piece apart is its beautifully aged dial. The original, unrestored dial has developed a striking leopard patinaan organic, spotted finish that can only come from decades of oxidation and exposure.