The Seiko 8V22A is a high-precision quartz analog movement featuring an advanced perpetual calendar mechanism. Released in the late 1990s and early 2000s, the 8V22A combines traditional analog time display with a calendar system programmed to automatically adjust for varying month lengths and leap years, requiring no manual date correction until the year 2100. This movement is widely appreciated for its reliable accuracy, long battery life, and low maintenance.

Commonly found in Seiko’s executive and dress watches, the 8V22A reflects Seiko’s commitment to blending classical design with modern technology.

Technical Specifications

• Caliber Number: 8V22A

• Movement Type: Quartz (Analog)

• Display:

  • Hour, minute, and second hands

  • Date window (usually at 3 o’clock)

  • Some models may include day-of-week display

• Calendar Function: Perpetual calendar accurate through February 28, 2100

• Accuracy: ±20 seconds per month (thermo-compensated quartz oscillator)

• Battery Type: SR927W (1.55V silver oxide)

• Battery Life: Approximately 7 to 10 years

• Jewels: None (electronic movement)

• Crown Positions:

  • Position 0: Normal running

  • Position 1: Date and day adjustment

  • Position 2: Time adjustment

Key Features

Perpetual Calendar

• Automatically adjusts for months with 30 or 31 days.

• Correctly accounts for leap years, including February 29th.

• Eliminates the need for manual calendar corrections for almost a century.

Accurate Timekeeping

• Thermo-compensated quartz oscillator delivers precise timekeeping.

• Maintains an accuracy of ±20 seconds per month.

Date and Day Display

• Date displayed in a clear window, typically at 3 o’clock.

• Some variants feature a day-of-week window.

• Instantaneous date change at midnight ensures smooth operation.

Long Battery Life

• Efficient energy consumption extends battery life up to 10 years.

• Uses SR927W silver oxide battery.

Operating Instructions

Time Setting

1. Pull the crown to the second click (Position 2).

2. Rotate the crown to set the hour and minute hands.

3. Push the crown back to Position 0 to resume timekeeping.

Date and Day Setting

1. Pull the crown to the first click (Position 1).

2. Rotate clockwise to adjust the date.

3. For models with a day window, rotate counterclockwise to set the day.

4. Avoid changing the date manually between 9 PM and 2 AM to prevent damage to the mechanism.

Battery Replacement and Maintenance

• Replace the battery with an SR927W silver oxide cell when necessary.

• Battery life typically ranges between 7 and 10 years.

• Battery replacement is best performed by a professional to maintain water resistance.

• No AC reset is generally required after battery replacement.

• Regular maintenance includes gasket replacement and pressure testing for water resistance.

Maintenance Recommendations

• No lubrication or mechanical servicing required.

• Avoid strong magnetic fields and shocks.

• Clean the watch regularly, especially after exposure to sweat or saltwater.

• Periodic water resistance testing is advised for water-resistant models.

Watches Featuring the 8V22A

The 8V22A is commonly used in Seiko’s:

• Executive and dress watches with perpetual calendar functions.

• Models with stainless steel, titanium, or precious metal cases.

• Watches emphasizing elegant design with precise quartz accuracy.

Summary Table

Conclusion

The Seiko 8V22A is a reliable and elegant quartz movement that combines accurate timekeeping with a perpetual calendar, minimizing the need for manual adjustments. Its long battery life, sophisticated design, and temperature-compensated quartz technology make it an excellent choice for those who appreciate classic analog watches with modern convenience. The 8V22A exemplifies Seiko’s dedication to precision and timeless style in their quartz watch collections.