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mega Caliber 1120A: Trusted Automatic Movement from the 1990s

The Omega Caliber 1120A is an automatic mechanical movement introduced as a variation of the Caliber 1120 during the 1990s. Like its predecessor, it is based on the ETA 2892-A2 platform, customized and refined by Omega for enhanced performance and reliability.

This caliber powers several Omega watch models, combining precision engineering with robust construction.

Technical Specifications

• Type: Automatic mechanical

• Functions: Hours, minutes, central seconds, quickset date

• Jewels: 23

• Frequency: 28,800 vibrations per hour (vph)

• Power Reserve: Approximately 44 hours

• Diameter: Approximately 25.6 mm

• Thickness: Suitable for medium-sized wristwatches

Watches Featuring Caliber 1120A

The Caliber 1120A was used in:

• Omega Seamaster Professional watches of the 1990s and early 2000s

• Omega Constellation models during the same period

• Selected other dress and sport watches requiring reliable automatic movements

Common watch features include:

• Stainless steel, gold, or two-tone cases

• Date windows at 3 o’clock

• Sapphire crystals with anti-reflective coatings

Performance and Durability

The 1120A offers:

• Smooth and efficient automatic winding

• Stable and precise timekeeping at 28,800 vph

• Robust construction suitable for everyday wear

• Moderate beat rate contributing to longevity and serviceability

Maintenance and Servicing

Recommended maintenance includes:

• Regular servicing every 4 to 6 years

• Cleaning and lubrication of movement components

• Replacement of worn parts as necessary

• Proper servicing of the automatic winding system

Authorized Omega service centers are the best option for maintenance.

Collector Appeal

Collectors appreciate the Omega Caliber 1120A for:

• Its reliability and refined finishing

• Use in several iconic Omega models from the 1990s and early 2000s

• Mechanical robustness and accurate performance

• Its representation of Omega’s quality standards in that era

Final Thoughts

The Omega Caliber 1120A is a trusted automatic movement that exemplifies Omega’s commitment to precision and durability in the 1990s. It remains highly regarded among collectors and enthusiasts of vintage Omega watches.