The Seiko V656A is a battery-powered quartz chronograph movement featuring a three-hand analog time display, 60-minute stopwatch, and a date function. It’s part of Seiko’s respected V600-series of quartz movements, engineered for sport, field, and casual watches that require reliable performance and easy servicing. Known for its precision, rugged construction, and straightforward operation, the V656A is a go-to choice for watchmakers building functional and affordable chronograph timepieces.

Overview

The V656A combines classic analog styling with stopwatch utility and a date display, making it a versatile choice for watches that need both everyday timekeeping and precise elapsed time measurement. It uses a central seconds chronograph hand and subdials to measure elapsed minutes and track running seconds.

Powered by a silver oxide battery, the V656A runs with high accuracy (±15 seconds per month) and requires little maintenance aside from battery replacement every 2–3 years.

Key Features

• Quartz Accuracy: ±15 seconds/month

• Chronograph Functions:

  • Central chronograph seconds

  • 60-minute counter (usually at 9 o’clock)

  • Small seconds hand (usually at 6 o’clock)

• Date Display: Quickset, generally positioned at 3 or 4 o’clock

• Battery Powered: Uses SR927W

• Hacking Seconds: Second hand stops when setting time for precision adjustment

• Chronograph Reset Calibration: Can manually reset chrono hands to zero if misaligned

Technical Specifications

• Caliber: Seiko V656A

• Movement Type: Quartz (battery-powered)

• Battery Type: SR927W (1.55V silver oxide)

• Battery Life: ~3 years under normal use

• Chronograph Timing Capacity: 60 minutes

• Calendar Type: Quickset date (no day)

• Jewel Count: 0

• Display Format: Analog 3-hand with chronograph and date

• Hand Hole Sizes:

  • Hour: 1.20 mm

  • Minute: 0.70 mm

  • Chronograph Seconds: 0.20 mm

• Dimensions:

  • Diameter: Approx. 27.0 mm

  • Thickness: Approx. 4.0 mm

This makes the V656A ideal for watch cases ranging from 38–44 mm, typically used in field, pilot, and sport chronograph watches.

Crown & Pusher Operation

Crown Positions:

• Position 0 (Fully In): Normal timekeeping

• Position 1 (One Click Out): Quickset date (rotate clockwise)

• Position 2 (Fully Out): Time setting (hacks second hand)

Pushers:

• Top Right (Button A): Start/Stop chronograph

• Bottom Right (Button B): Reset chronograph to zero (after stopping)

Chronograph Reset Alignment: If chronograph hands don’t reset correctly, enter correction mode (crown in position 2) and adjust hand alignment using pushers.

Battery Replacement & AC Reset

1. Open case back and remove the SR927W battery using non-metallic tweezers.

2. Insert a new battery with correct polarity.

3. Perform an AC reset: bridge the AC contact with the battery (+) edge using tweezers or a conductive probe.

4. Confirm the movement resumes ticking.

Tip: Always replace gaskets and pressure-test water-resistant models after battery change.

Servicing & Maintenance

• Calendar Inspection: Ensure smooth operation of the date wheel. Light lubrication is permissible on date gear teeth.

• Hands Alignment: Use precision hand-press tools to avoid misalignment or friction between hands.

• Lubrication: No general oiling required, but pushers and keyless works can be lubricated lightly.

• Dust Prevention: Always keep dial and crystal clean—dust on subdials may impact visibility or aesthetics.

Common Issues

• Chronograph Hand Misaligned: Correct using pusher reset function with crown pulled to position 2.

• Chronograph Stops Prematurely: Caused by obstruction or mechanical resistance in the pusher system—inspect for dirt or wear.

• Watch Stops Early: Weak or discharged battery. Clean contacts and replace with a fresh SR927W.

• Pushers Feel Sticky: Often from dried lubricant or debris. Clean and lubricate carefully.

• Date Doesn’t Change: Avoid setting date between 9 PM and 3 AM. Gear damage may occur if forced during this window.

Applications

The Seiko V656A is frequently used in:

• Analog quartz chronograph sport watches

• Field and military-style timepieces

• Everyday wear watches with timing functionality

• Affordable mid-range chronograph collections

Its clean layout, intuitive controls, and proven durability make it a favorite among brands looking to deliver practical, function-forward timepieces.

Conclusion

The Seiko V656A is a dependable quartz chronograph movement designed for precision, durability, and ease of use. With stopwatch capability, date display, and hacking seconds, it’s a strong all-around performer for field, sport, and utility watches. Backed by Seiko’s reputation for engineering excellence, the V656A offers watchmakers a solid foundation for analog chronograph designs with long service life and minimal maintenance.