Omega Caliber 1525: A Robust Automatic Movement of the 1970s

The Omega Caliber 1525 is an automatic mechanical movement introduced in the early 1970s as part of the 1500-series. It is based on the well-regarded ETA 2783 caliber, customized by Omega to meet its rigorous standards for reliability and performance.

This caliber is prized for its robust construction, smooth automatic winding, and precise timekeeping, making it a favorite among collectors of vintage Omega watches.

Technical Specifications

• Type: Automatic mechanical

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

• Jewels: 23

• Frequency: 19,800 vibrations per hour (vph)

• Power Reserve: Approximately 42 hours

• Hacking Seconds: Yes (seconds hand stops when setting time)

• Diameter: 28.00 mm

• Thickness: Approximately 5.35 mm

• Beat Rate: 2.75 Hz

Watches Featuring Caliber 1525

The Caliber 1525 was commonly used in:

• Omega Seamaster watches from the early to mid-1970s

• Various models in the Omega Genève line

• Other vintage Omega watches requiring a reliable automatic movement with date

These watches typically feature:

• Stainless steel or gold-plated cases

• Date windows at the 3 o’clock position

• Clean and classic dial designs

• Acrylic or sapphire crystals depending on production year

Performance and Durability

The 1525 movement is known for:

• Reliable and smooth automatic winding mechanism

• Robust design capable of enduring daily wear

• Quickset date function for easy calendar adjustments

• Hacking seconds for accurate time setting

Its moderate beat rate contributes to excellent durability and simplifies servicing.

Maintenance and Servicing

As a mechanical caliber, the 1525 requires:

• Routine servicing every 4 to 6 years

• Cleaning and lubrication of moving parts

• Inspection for wear and replacement of worn components

Thanks to its ETA base, replacement parts remain widely available, facilitating repair and maintenance.

Collector Appeal

Collectors value the Omega Caliber 1525 for:

• Its reputation as a durable and precise automatic movement

• Its role in Omega’s history during a golden era of mechanical watchmaking

• Its inclusion in many sought-after vintage Omega watches

• Its combination of robustness and elegant design

Final Thoughts

The Omega Caliber 1525 is a classic automatic mechanical movement that blends Swiss precision, reliability, and timeless design. It remains a popular choice for vintage watch collectors and enthusiasts seeking authentic Omega timepieces from the 1970s.