Omega – Calatrava Jumbo – Cal. 266 Oversize 38 mm Case – Two-Tone Dial – Vintage 1950s Offered for auction is an exceptional and rare Omega Calatrava Jumbo, a vintage Swiss timepiece from the 1950s distinguished by its oversized 38 mm case, an extremely uncommon dimension for watches of that era. Omega, founded in 1848, is one of the most prestigious names in Swiss watchmaking, renowned for precision, innovation, and timeless design. During the mid-20th century, Omega produced some of the most elegant and mechanically refined dress watches, many of which are now highly sought after by collectors. This particular piece stands out not only for its impressive size, but also for its beautifully balanced dial and classic small-seconds configuration. Technical Details: Brand: Omega Model: Calatrava Jumbo Reference: 2506-29 (engraved inside caseback) Year: 1950s Case Material: Stainless steel Case Diameter: 38 mm (excluding crown) – rare oversized case for the period Crystal: Acrylic glass Dial: Two-tone silver dial with golden accents (possible professional restoration) Functions: Hours, Minutes, Small Seconds at 6 o’clock Water Resistance: Not tested for water resistance Movement: Swiss mechanical Omega Caliber 266 (manual winding) Caseback: Signed Omega Watch Co – Acier Inoxydable – Fab. Suisse – Swiss Made Strap: Generic brown leather strap with Omega-signed buckle Condition: Grade A- – very clean example with light signs of wear consistent with age Box: Generic box included The dial features an elegant two-tone design, combining a brushed outer ring with a lighter central field, complemented by applied gold-tone hour markers and matching dauphine hands. The overall aesthetic is refined, balanced, and highly representative of classic Omega dress watches. The small seconds subdial at 6 o’clock adds depth and symmetry, while the crisp printing and layout enhance legibility and vintage appeal. The dial may have undergone a professional restoration, maintaining a clean and attractive presentation. The stainless steel case is particularly notable for its oversized 38 mm diameter, which was exceptionally large for the 1950s, giving the watch a strong wrist presence even by modern standards. The case remains in very good condition, with sharp lugs and only minor signs of wear. Inside, the watch houses the respected Omega Caliber 266, a reliable and well-finished manual-winding movement known for its durability and precision. The movement appears clean and well preserved, reflecting the quality of Omega’s mid-century production. The watch is fitted with a brown leather strap paired with an Omega-signed buckle, completing its classic and elegant appearance. Story & Heritage: During the 1940s and 1950s, Omega was at the forefront of Swiss watchmaking, producing both technical instruments and refined dress watches. Models with larger cases were extremely rare at the time, as most watches measured between 32–34 mm. This “Jumbo” configuration was therefore produced in very limited numbers, making surviving examples highly collectible today. The design follows the timeless Calatrava style, characterized by clean lines, elegant proportions, and a focus on pure readability — a philosophy that continues to define classic watchmaking. This watch represents a unique combination of rare size, iconic Omega craftsmanship, and timeless vintage design, making it a standout piece for collectors. A rare opportunity to acquire a vintage Omega Jumbo from the golden era of Swiss watchmaking. The watch will be carefully packed and shipped insured. Express Delivery Via UPS Express Internal Reference Number - Itm. 690