The Seiko 8325A is a precise and durable quartz analog movement featuring a date complication. Manufactured primarily in the 1980s, this movement is part of Seiko’s established quartz lineup designed to deliver consistent and reliable timekeeping for everyday watches. Known for its robust construction and ease of maintenance, the 8325A was favored in many models for its accuracy and functional simplicity.

Technical Specifications

• Caliber Number: 8325A

• Movement Type: Quartz (Analog)

• Display:

  • Hour, minute, and seconds hands

  • Date window, usually at the 3 o’clock position

• Accuracy: Approximately ±20 seconds per month

• Battery Type: SR927W (1.55V silver oxide)

• Battery Life: Approximately 2 to 3 years

• Jewels: None (electronic movement)

• Crown Positions:

  • Position 0: Normal operation

  • Position 1: Date adjustment

  • Position 2: Time adjustment

Key Features

Accurate Timekeeping

Powered by a quartz crystal oscillator, the 8325A provides precise timekeeping with a typical accuracy of ±20 seconds per month, suitable for reliable daily use.

Date Display

Features a date window positioned at 3 o’clock for quick and clear date reading. The date is easily adjustable through the crown mechanism.

Efficient Power Consumption

The movement uses an SR927W silver oxide battery, providing energy-efficient operation with a lifespan of about two to three years.

Operating Instructions

Time Setting

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

2. Rotate the crown clockwise or counterclockwise to set the correct time.

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

Date Setting

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

2. Rotate the crown clockwise to advance the date to the desired number.

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

4. Push the crown back to Position 0 when finished.

Battery Replacement and Maintenance

• Use an SR927W silver oxide battery for replacement.

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

• Battery replacement should ideally be performed by a qualified watch technician to maintain water resistance.

• No special reset procedure is required post battery replacement, though time and date should be verified.

Maintenance Recommendations

• The 8325A is fully electronic and requires no lubrication or mechanical servicing.

• Protect the watch from strong magnetic fields, shocks, and extreme temperatures.

• Regular cleaning of the watch case and crystal helps maintain appearance and performance.

• Water resistance testing is advisable if the watch is regularly exposed to moisture.

Watches Featuring the 8325A

The 8325A movement was commonly installed in:

• Seiko quartz watches during the 1980s and early 1990s.

• Models emphasizing durability and practical functionality.

• Watches designed with classic styling suitable for everyday wear.

Summary Table

Conclusion

The Seiko 8325A quartz movement offers dependable and accurate timekeeping coupled with a user-friendly date function. Its simple yet effective design, combined with efficient power usage, makes it a solid choice for everyday watches. The 8325A reflects Seiko’s reputation for producing durable and precise quartz movements that stand the test of time.