The Seiko 7N01C is a reliable and precise quartz analog movement featuring a practical date complication. This caliber belongs to Seiko’s family of quartz movements introduced in the late 1990s and early 2000s, known for combining accuracy, efficiency, and durability. The 7N01C is favored in many Seiko watches for its dependable performance and ease of use, making it an excellent choice for everyday timepieces.

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Technical Specifications

• Caliber Number: 7N01C

• Movement Type: Quartz (Analog)

• Display:

  • Hours, minutes, seconds hands

  • Date window at the 3 o’clock position

• Accuracy: Approximately ±15 seconds per month

• Battery Type: SR920SW (1.55V silver oxide)

• Battery Life: Typically 2 to 3 years

• Jewels: None (fully electronic quartz movement)

• Crown Positions:

  • Position 0: Normal running

  • Position 1: Date adjustment

  • Position 2: Time adjustment

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Key Features

Accurate Timekeeping

The 7N01C utilizes a quartz crystal oscillator regulated by an integrated circuit to achieve an accuracy of ±15 seconds per month. This ensures reliable and precise timekeeping suitable for daily wear.

Convenient Date Function

The movement incorporates a date complication displayed clearly in a window at 3 o’clock, enabling easy manual date adjustments through the crown.

Efficient Power Consumption

Powered by an SR920SW silver oxide battery, the 7N01C is optimized for low energy use, allowing a battery life typically lasting between two and three years.

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Operating Instructions

Time Setting

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

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

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

Date Setting

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

2. Rotate the crown clockwise to advance the date.

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

4. Push the crown back to Position 0 after adjusting the date.

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Battery Replacement and Maintenance

• The movement requires an SR920SW silver oxide battery for power.

• Typical battery life ranges between 2 to 3 years depending on usage.

• Professional battery replacement is recommended to preserve water resistance and proper sealing.

• After battery replacement, check and reset time and date as necessary. No special reset procedure is usually required.

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Maintenance Recommendations

• The 7N01C is fully electronic and requires no mechanical lubrication.

• Protect the watch from strong magnetic fields, shocks, and temperature extremes to maintain accuracy and longevity.

• Clean the watch case and crystal regularly to preserve appearance and function.

• Pressure testing is advised for water-resistant models after servicing or battery replacement.

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Watches Featuring the 7N01C

The 7N01C movement is found in:

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

• Models emphasizing simple, reliable analog timekeeping with a date function.

• Everyday watches designed for durability and ease of use.

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Summary Table

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Conclusion

The Seiko 7N01C quartz movement provides precise and dependable analog timekeeping with an easy-to-use date function. Its efficient power consumption, low maintenance, and reliable accuracy make it ideal for everyday watches. The 7N01C continues Seiko’s tradition of producing high-quality quartz calibers that combine performance, durability, and user-friendly features in a classic analog design.

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