Omega Cosmic 2485 – Moonphase Jumbo – 1947 / A Complicated Classic in 18k Gold

The Omega Cosmic was introduced in 1947 as the most prestigious model in Omega’s post-war catalogue — and this early Reference 2485 shows exactly why. Housed in a rare 37 mm 18k yellow gold case, it features a complete calendar with moonphase complication, powered by the revered Caliber 381, based on a Lemania ébauche.

The elegant dial showcases day and month windows at the top (Spanish language wheels), a moonphase within the sub-seconds at six, and a vibrant blue date track encircling the design. Combined with gold hands, a blue date hand, and the warm patina of time, this piece has undeniable charisma.

Preserved in beautiful original condition and unpolished, this Cosmic wears large, both in size and presence. For collectors of vintage complication watches, this one is pure stardust.

- wrist size in our picture is 18cm circumference -

DIAL:

• original never touched cream dial in good overall condition
• original hands, dial and crown
• has some slight patina throughout the dial
• slight scratches at 9 o'clock and under the day/date
• day and month wheel is in Spanish language

STRAP & BUCKLE:

• cognac brown GOLDAMMER calf leather strap fitting up to 20 cm wrist size
• gold plated stainless steel GOLDAMMER buckle

CASE:

• excellent overall condition, showing minor traces of use (unpolished)
• 3- body 18k yellow gold case with snap-on case back
  
• 37 mm (without crown) / 44 mm (lug-to-lug) / 18 mm (between lugs) / 11 mm thick
• reference: 2485
• year: 1947
• total weight: 51g

MOVEMENT:

• Omega Cal. 381
  
• 18 jewels, 18000 A/h, 44 hours power reserve
• professionally serviced in 09/2025
• -15 sec/d / 320°

BOX & PAPERS:

• GOLDAMMER certificate of authenticity & service documentation card
• GOLDAMMER box

GOLDAMMER REFERENCE: #1151