Omega Caliber 1045: High-Performance Automatic Chronograph Movement

The Omega Caliber 1045 is an automatic mechanical chronograph movement introduced in the late 1970s. It is a modified version of the Lemania 5100 caliber, renowned for its robustness and reliability. Omega customized the 1045 to meet their exacting standards, resulting in a chronograph movement well-regarded among professionals and collectors.

Technical Specifications

• Type: Automatic mechanical chronograph

• Functions: Hours, minutes, central chronograph seconds, 12-hour and 30-minute counters, day and date complications

• Jewels: 17

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

• Power Reserve: Approximately 44 hours

• Diameter: Approximately 30 mm

• Thickness: Around 7.9 mm

Watches Featuring Caliber 1045

The Caliber 1045 powered several iconic Omega models, including:

• Omega Speedmaster Mark series (e.g., Mark IV, Mark V, Mark VI)

• Seamaster chronographs of the late 1970s and early 1980s

• Professional-grade chronograph watches designed for durability and precision

These watches often featured:

• Stainless steel cases with robust, tool-watch designs

• Tachymeter or rotating bezels

• Day-date windows, often at 3 o’clock

• Hesalite or sapphire crystals depending on the model

Performance and Durability

The Omega Caliber 1045 is celebrated for:

• Exceptional robustness and shock resistance, ideal for professional use

• Smooth automatic winding and precise chronograph functions

• Legible dial layouts with easy-to-read subdials

• High beat rate ensuring accurate and stable timekeeping

Maintenance and Servicing

Maintaining the 1045 involves:

• Regular servicing every 3 to 5 years

• Cleaning, lubrication, and precise adjustment of timekeeping and chronograph components

• Replacement of worn parts to preserve functionality and accuracy

Due to the movement’s complexity, professional servicing by experienced watchmakers is recommended.

Collector Appeal

Collectors value the Omega Caliber 1045 for:

• Its reputation as a durable and reliable professional chronograph movement

• Use in iconic Speedmaster Mark and Seamaster models

• Mechanical excellence combined with practical features

• Vintage appeal and historical significance in Omega’s lineup

Final Thoughts

The Omega Caliber 1045 stands as a landmark in Omega’s chronograph heritage, known for its toughness and precision. It remains highly prized by collectors and watch enthusiasts who seek reliable, vintage automatic chronographs.