The Seiko 7N22C is a reliable and accurate quartz analog movement featuring both day and date complications, designed for everyday wristwatches. This caliber, introduced in the late 1990s and early 2000s, exemplifies Seiko’s dedication to producing durable and user-friendly quartz movements. The 7N22C is valued for its precise timekeeping, practical features, and straightforward operation, making it a favored choice for daily-wear watches.

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Technical Specifications

• Caliber Number: 7N22C

• Movement Type: Quartz (Analog)

• Display:

  • Hour, minute, and seconds hands

  • Combined day and date windows, typically positioned at 3 o’clock

• Accuracy: Approximately ±15 seconds per month

• Battery Type: SR920SW or equivalent silver oxide battery (1.55V)

• Battery Life: Approximately 2 to 3 years

• Jewels: None (fully electronic quartz movement)

• Crown Positions:

  • Position 0: Normal running

  • Position 1: Day/date adjustment

  • Position 2: Time adjustment

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Key Features

Precise Timekeeping

The 7N22C movement utilizes a quartz crystal oscillator controlled by an integrated circuit, maintaining accurate time within ±15 seconds per month to ensure consistent performance.

Day and Date Function

Featuring day and date complications in a combined window, the movement displays the day in abbreviated text form alongside the numeric date, typically at 3 o’clock. Both are adjustable through the crown.

Efficient Battery Use

Powered by an SR920SW silver oxide battery, the 7N22C offers optimized power consumption, delivering a battery life typically between two and three years.

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Operating Instructions

Time Setting

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

2. Rotate the crown clockwise or counterclockwise to adjust the hour and minute hands.

3. Push the crown back to Position 0 to resume normal operation.

Day and Date Setting

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

2. Rotate the crown clockwise to change the date.

3. Rotate the crown counterclockwise to set the day.

4. Avoid adjusting the day or date manually between 9 PM and 2 AM to prevent damage to the date-change mechanism.

5. Push the crown back to Position 0 after adjustment.

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Battery Replacement and Maintenance

• Use an SR920SW silver oxide battery or equivalent for replacement.

• Battery life typically lasts between 2 and 3 years depending on usage.

• Professional battery replacement is recommended to maintain water resistance and prevent damage.

• After battery replacement, verify time, day, and date settings. No special reset procedure is normally required.

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Maintenance Recommendations

• The 7N22C is fully electronic and requires no lubrication.

• Avoid exposure to strong magnetic fields, shocks, and extreme temperature fluctuations to preserve accuracy and longevity.

• Regularly clean the watch case and crystal to maintain appearance and function.

• Pressure test water-resistant models periodically, especially after servicing or battery replacement.

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Watches Featuring the 7N22C

The 7N22C caliber is found in:

• Seiko quartz analog watches from the late 1990s and early 2000s.

• Models emphasizing practical day and date features combined with precise timekeeping.

• Everyday watches designed for durability and user convenience.

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Summary Table

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Conclusion

The Seiko 7N22C quartz movement delivers accurate and reliable analog timekeeping enhanced with convenient day and date complications. Its efficient battery consumption, low maintenance, and solid construction make it an excellent choice for everyday watches. The 7N22C reflects Seiko’s commitment to producing durable, user-friendly quartz calibers that offer precision, practicality, and longevity.

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