A rare and charming example of mid-century Swiss watchmaking. This rectangular Oris features a classic "Tank" silhouette, strongly influenced by the Art Deco movement. With its elegant Arabic numerals and dedicated sub-dial for seconds, it is a perfect "dress watch" for collectors of vintage horology. Specifications • Brand: Oris • Model: Rectangular / Tank Style • Period: 1940s / 1950s • Movement: Manual Winding (Mechanical), likely Calibre 451/461 • Jewels: 15 Jewels • Case Material: Chrome-plated case with Stainless Steel back (Fond Acier Inoxydable) • Dial: Silver/Champagne with Art Deco Arabic numerals and "Small Seconds" sub-dial at 6 o'clock • Crystal: Acrylic • Strap: Modern tri-color (Blue/White/Red) NATO strap Detailed Condition Report • Dial: The original dial has developed an authentic "stardust" patina (small age spots) across the surface, giving it a true vintage character. The Oris logo and "Swiss Made" signature remain clearly legible. • Case: Shows signs of wear consistent with age. There is some minor thinning of the chrome plating on the sharp edges and lugs, revealing the base metal underneath—a common trait for watches of this era. • Crystal: The acrylic crystal is in good condition but shows a light surface scratch/mark near the 11 o'clock position (visible under certain light). • Movement: The manual wind movement is running. And has recently been serviced