The Seiko 9552A is a reliable and compact quartz analog movement with a quickset date function, widely used in Seiko dress and casual watches from the late 1980s through the early 2000s. Part of Seiko’s 9500-series, the 9552A is valued for its slim profile, straightforward design, and long battery life. It is especially common in watches with minimalist dials and slim stainless-steel cases, both for men and women.

Technical Specifications

• Caliber Number: 9552A

• Movement Type: Quartz (step motor, analog only)

• Display: Hour, Minute, Center Seconds, Date

• Calendar: Quickset date window at 3 o'clock

• Jewels: 0 jewels (non-jeweled)

• Battery Type: SR626SW (1.55V silver oxide cell)

• Battery Life: Approximately 3 years

• Accuracy: ±15 seconds per month

• Dimensions:

  • Size: 7¾ x 11 lignes (approximately 17.5 mm x 24.0 mm)

  • Height: ~2.5 mm

• Hand Fitting Sizes:

  • Hour: 1.20 mm

  • Minute: 0.70 mm

  • Second: 0.20 mm

Features and Operation

The Seiko 9552A offers a clean three-hand configuration with a quickset date function, making it ideal for everyday watches. It does not support a day-of-week display or digital features, but the inclusion of a date window improves daily utility.

Crown Operation:

• Position 0 (pushed in) – Normal operation

• Position 1 (first click) – Quickset date (turn clockwise)

• Position 2 (second click) – Time setting with hacking (second hand stops)

This movement includes a hacking feature, which allows the user to stop the seconds hand during time setting for precise synchronization.

Battery Replacement and Reset Procedure

Battery changes on the 9552A are simple but require careful handling:

1. Open the case back using the appropriate tool.

2. Remove the old SR626SW battery using non-metallic tweezers.

3. Insert the new battery, ensuring correct polarity and secure contact with terminals.

4. Use tweezers to short the AC (All Clear) contact with the battery’s negative terminal for 2–3 seconds to reset the circuit.

5. Reinstall the case back and verify hand movement and calendar function.

A proper reset ensures the integrated circuit powers on correctly and avoids erratic behavior or failure to start.

Servicing and Maintenance

• Lubrication: The 9552A is a dry, non-jeweled movement and requires only minimal lubrication on key gear train points.

• Calendar Mechanism: Avoid changing the date between 9:00 PM and 4:00 AM, as doing so may damage the date-change gears.

• Cleaning: Light brushing and air cleaning are usually sufficient. Keep the movement free from dust and moisture.

• Replacement: If the circuit block or coil fails, full movement replacement is typically more economical than repair.

Identification and Use

The caliber number “9552A” is stamped on the movement plate, usually near the battery well. It is commonly found in Seiko watches with reference numbers starting with 7N42 or 9552, especially those marketed as slim quartz dress watches.

Conclusion

The Seiko 9552A is a robust, low-maintenance quartz movement with a practical date display and precise timekeeping. Its combination of durability, compact size, and reliability makes it a favorite for slim Seiko models and an excellent choice for both collectors and daily wearers. With proper care and occasional battery service, the 9552A can remain accurate and functional for decades.