Omega Caliber 1640: Multifunction Quartz in a Sleek, Wearable Form

The Omega Caliber 1640 is a quartz analog-digital multifunction movement, introduced in the late 1980s, continuing Omega’s legacy of offering technically capable and stylish watches in the hybrid format. It evolved from earlier multifunction calibers like the 1611 and 1615, simplifying the feature set while maintaining the dual-display (analog + LCD) format favored by professionals, travelers, and those seeking more than just timekeeping.

This movement is best known for powering later versions of the Omega Seamaster Polaris Multifunction—a model that stood apart for its lightweight titanium construction, integrated bracelet design, and futuristic aesthetic.

Technical Specifications

• Type: Quartz analog-digital hybrid

• Functions:

  • Analog display: hours and minutes

  • LCD digital display for:

    • 12/24-hour time

    • Second time zone (T2)

    • Date and day

    • Alarm

    • Chronograph

    • Countdown timer

• Battery: 371 (SR920SW)

• Battery Life: ~2 years

• Accuracy: ±15 seconds/month

• Controls: Pushers (typically 2 or 3, depending on case design)

• Display: Analog hands + small digital LCD (at 6 o’clock position)

• Sound Alert: Yes (for alarm and confirmations)

The Cal. 1640 was likely based on a customized ETA multifunction platform, with Omega-specific programming and layout refinements for improved usability and design integration.

Watches Featuring Caliber 1640

The movement was used in:

• Omega Seamaster Polaris Multifunction (late-generation models)

• Constellation analog-digital hybrids (select references)

• Market-specific multifunction variants, especially in Asia and Europe

These watches shared common design traits:

• Titanium or bi-metal (titanium/gold) cases

• Integrated bracelet design with modular links

• Minimalist, clean dial design with digital screen inset at 6 o’clock

• Fixed or non-rotating bezels

Though sporty in appearance, these watches were worn as daily-wear all-rounders by many professionals during the 1990s.

Functionality and Everyday Use

The Caliber 1640 offered true multifunction capability for daily life:

• Dual time zones: analog for local, digital for travel

• Alarm: easy to set with audible alert

• Date and day display: practical for work

• Chronograph and countdown timer: suitable for basic timing tasks

The mode selection and digital readout were controlled via pushers, and the analog hands were set using the crown. Both displays operated independently.

Service and Maintenance

The Cal. 1640 is a stable and repairable quartz platform, though digital components—especially the LCD—can become brittle or faded over time. Battery changes are simple, and Omega-certified watchmakers can handle most basic servicing. However, replacement parts are limited to donor movements or NOS (new old stock) modules, as production has ceased.

Collector Appeal

Collectors are starting to appreciate 1640-powered watches for:

• Their distinctive 1990s styling

• Practical dual-display functionality

• High-quality finishing despite quartz origins

• Historical placement in Omega’s quartz evolution

Seamaster Polaris models with this movement are particularly sought after in good condition with original bracelets and full LCD functionality.

Final Thoughts

The Omega Caliber 1640 represents the tail end of a unique era—where Swiss quartz technology met everyday versatility. For those who value vintage functionality, discreet charm, and timeless Omega quality, this caliber remains a compelling and collectible choice.