The Seiko 8800D is a refined quartz analog movement from Seiko, known for its accuracy, reliability, and ease of use. Building upon the foundation laid by earlier calibers like the 8800C, the 8800D incorporates subtle improvements in efficiency and durability. Widely used in Seiko watches throughout the late 20th century, this movement balances precision timekeeping with a convenient date function, making it a practical choice for everyday wear.

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Technical Specifications

• Caliber Number: 8800D

• Movement Type: Quartz (Analog)

• Display:

  • Hours, minutes, seconds hands

  • Date window, typically at 3 o’clock

• Accuracy: Approximately ±20 seconds per month

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

• Battery Life: 2 to 3 years

• Jewels: None (fully electronic quartz movement)

• Crown Positions:

  • Position 0: Normal operation

  • Position 1: Date adjustment

  • Position 2: Time adjustment

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Key Features

Quartz Precision

The 8800D movement is powered by a stable quartz oscillator regulated by an integrated circuit (IC), delivering consistent timekeeping with an accuracy of ±20 seconds per month.

Date Complication

Includes a date display window that advances automatically each day. The date is manually adjustable via the crown, allowing quick correction after shorter months.

Enhanced Power Efficiency

The movement is designed for optimized power consumption, using an SR920SW silver oxide battery to provide reliable operation for approximately 2 to 3 years per battery.

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Operating Instructions

Setting the Time

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

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

3. Push the crown back to Position 0 to restart the movement.

Setting the Date

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

2. Rotate the crown clockwise to advance the date.

3. Avoid setting the date between 9 PM and 2 AM to prevent damage to the date-change mechanism.

4. Return the crown to Position 0 after setting.

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Battery Replacement and Maintenance

• Replace the battery with a genuine SR920SW silver oxide cell when power diminishes.

• Battery life generally spans 2 to 3 years depending on usage and environmental factors.

• Battery replacement by a professional watchmaker is recommended to maintain water resistance and proper handling.

• No specific reset is required after battery replacement; time and date settings should be verified.

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Maintenance Guidelines

• The 8800D is fully electronic and does not require lubrication or mechanical servicing.

• Avoid exposure to strong magnetic fields, shocks, and extreme temperatures to protect movement integrity.

• Clean the watch regularly to keep it in optimal condition.

• Pressure test water-resistant watches periodically, especially after servicing or battery changes.

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Applications

The 8800D movement was used in a range of Seiko watches, including:

• Analog quartz watches produced primarily in the late 1980s and 1990s.

• Models emphasizing simple, reliable time and date functions.

• Watches designed for everyday durability and ease of use.

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Summary Table

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Conclusion

The Seiko 8800D quartz movement offers dependable and accurate timekeeping with a straightforward date function. Its optimized power consumption, reliable construction, and ease of maintenance make it an excellent choice for everyday watches. The 8800D highlights Seiko’s dedication to precision quartz engineering, combining classic analog design with modern reliability.