Omega Caliber 1680A: The Polished Evolution of Analog-Digital Functionality

The Omega Caliber 1680A is a quartz analog-digital multifunction movement introduced in the mid-to-late 2000s, likely as one of the last iterations in Omega’s 16xx-series of hybrid calibers. Designed for sport-luxury watches, the 1680A offered both modern functionality and the classic appearance of a traditional analog dial.

A refinement of earlier multifunction calibers like the 1675 and 1666, the 1680A incorporated streamlined operation, improved energy efficiency, and optimized LCD display contrast—all packed into watches that balanced professional-grade features with understated design.

Technical Specifications

• Type: Quartz analog-digital hybrid

• Functions:

  • Analog display: hours, minutes, central seconds

  • Digital display (LCD, usually at 6 o’clock):

    • Digital time (12/24-hour format)

    • Dual time zone (T2)

    • Alarm

    • Countdown timer

    • Chronograph

    • Day/date calendar

• Battery: CR1620 lithium cell

• Battery Life: ~24–30 months

• Accuracy: ±15 seconds/month

• Controls: Crown + pushers (varies by model)

• Backlight: No

• Audible Alerts: Yes (alarm, mode confirmations)

The 1680A is believed to be a custom Omega variant of an advanced ETA multifunction platform, tailored with Omega-specific interface logic and premium finishing.

Watches Featuring Caliber 1680A

The Cal. 1680A was likely used in:

• Seamaster Professional Multifunction (later references)

• Limited-market Constellation hybrids

• Special edition quartz sport models with luxury cases

These watches typically featured:

• Stainless steel or titanium construction

• Classic Omega diver or sport-dress aesthetics

• Discreet digital windows subtly integrated into the dial

• Rotating or fixed bezels depending on the case style

• Screw-down crowns and water resistance of 100–300 meters

This movement allowed Omega to offer high functionality in a watch that looked and wore like a traditional analog timepiece, appealing to users who needed real-world tools—without sacrificing design.

Practical Functionality

The Omega 1680A was ideal for:

• Travelers: dual time zones and easy switching

• Professionals: discreet alarms and timers

• Sports use: accurate chronograph and countdown functions

• Daily life: quick date visibility and intuitive controls

The LCD screen was clean and legible without dominating the dial, and the analog-digital independence allowed for multi-tasking without disruption.

Maintenance and Reliability

The 1680A is a robust movement that requires minimal maintenance:

• Battery replacement every 2–3 years

• Seals and pushers should be checked for water resistance

• LCD aging is uncommon but should be monitored

Servicing is best done by Omega-authorized watchmakers, though replacement modules may be sourced from compatible donor watches if necessary.

Collector Appeal

Omega watches with the Cal. 1680A appeal to those who value:

• Discreet multifunctionality

• Sporty Omega heritage

• Modern quartz precision in a classic case

• Affordable collectibility compared to mechanical models

These models remain underrated and under-the-radar, especially in full-original condition with functioning LCDs and original packaging.

Final Thoughts

The Omega Caliber 1680A marks a sophisticated end to Omega’s analog-digital quartz era—delivering practical tools, timeless design, and Swiss reliability. As hybrid watches gain renewed attention in today’s smart-dominated world, 1680A-powered Omegas stand as quietly brilliant companions for those who appreciate precision with purpose.