1956 Omega 2640

The 1956 Omega Ref. 2640 is a beautiful example of mid-century Swiss watchmaking, embodying the clean lines, balanced proportions, and mechanical excellence that helped establish Omega as one of the world's premier watch manufacturers. Often referred to by collectors as a "Jumbo" due to its generous 36mm case—a notably large size for the era—the Ref. 2640 offered a more contemporary wrist presence than many of its 33–34mm counterparts. Its timeless design features a slim stainless steel case, elegant dauphine hands, applied hour markers, and a beautifully proportioned dial that ranges from simple silver sunburst finishes to rare retailer-signed examples. The result is a dress watch whose understated sophistication remains just as appealing today as it was nearly seventy years ago.

At the heart of the Ref. 2640 is Omega's legendary manual-wind Caliber 284, a movement descended from the famed 30T2 family that earned Omega international acclaim for its precision, durability, and reliability. Celebrated for its large balance wheel, copper-colored finish, and robust construction, the Caliber 284 is regarded as one of the finest manually wound movements of the 1950s and remains highly respected by collectors and watchmakers alike.

Today, the 1956 Omega Ref. 2640 represents one of the best values in vintage Swiss watch collecting. Its larger case size, timeless styling, and exceptional movement make it remarkably wearable by modern standards while preserving all the charm of a true mid-century timepiece. Original examples with sharp case lines, untouched dials, and correct period components are increasingly sought after, particularly those exhibiting attractive natural patina. For enthusiasts looking to own a piece of Omega's golden era, the Ref. 2640 offers an outstanding combination of historical significance, everyday versatility, and enduring mechanical craftsmanship that continues to stand the test of time.

Reference: 2640

Circa: 1956

Serial: 15,575,XXX

Dial/hands: Tritium

Bracelet: Black Leather Strap

Case: 36mm - Stainless Steel

Lug Width: 18mm

Movement: Omega 284 - Manual

Functions: HMS

Box and Papers: No box or papers - watch only

Crystal: Plexiglass

Bracelet size: 7.25”

Case has light wear with nothing notable. Strap has minimal wear. Dial has been refinished in the past. Hands have minimal wear. Watch is running strong.