How to set a TMI NH35A automatic watch

Introduction

The NH35A caliber from TMI (Time Module Inc.), a subsidiary of Seiko, is one of the most reliable and widely used automatic movements in the world. You will find it in many PANTER watches, and understanding how it works will allow you to get the most out of it and take proper care of it.

In this guide, we explain step-by-step how to set your watch, how the screw-down crown for water resistance works, and what you should consider to avoid damaging the mechanism.

Before you start: the screw-down crown for water resistance

Most PANTER watches with the NH35A caliber feature a screw-down crown. This system is essential to ensure the watch's water and dust resistance.

How does it work?

The screw-down crown works like a screw cap: when fully screwed in, it creates a hermetic seal that protects the inside of the watch. To operate it, you must first unscrew it.

Steps to unscrew the crown:

1. Hold the watch firmly.
2. Using your thumb and forefinger, gently turn the crown counter-clockwise (towards you) until you feel it release and you can pull it out.
3. Never force it: if it offers resistance, keep turning counter-clockwise. Never pull without having fully unscrewed it.

⚠️ Important: Never manipulate the crown when the watch is submerged or wet. Make sure it is completely dry before unscrewing it.

NH35A Crown Positions

Once unscrewed, the NH35A crown has 3 positions:

• Position 0 (pushed in): Resting position. The watch functions normally and is automatically wound by wrist movement. You can also manually wind the power reserve by turning the crown clockwise.
• Position 1 (first click out): Allows you to adjust the day of the week (if your model has a day) and the date. Turn the crown clockwise to advance the date, and counter-clockwise to change the day.
• Position 2 (second click, fully out): Allows you to set the hour and minutes. Turn clockwise to advance.

Step-by-step: how to set the NH35A

1. Unscrew the crown by turning counter-clockwise until it releases.
2. Manual winding (optional but recommended): With the crown in position 0, turn it clockwise 20-30 times to provide initial power reserve, especially if the watch has been stopped for some time.
3. Set the date: Pull the crown out to the first click (position 1) and turn it clockwise until you reach the correct day. Note: Do not adjust the date between approximately 9 PM and 3 AM, as the date mechanism is in motion and could be damaged.
4. Set the time: Pull the crown out to the second click (position 2) and turn it until you set the correct time. The second hand stops when it reaches this position, allowing you to synchronize precisely.
5. Push the crown in to position 0.
6. Screw in the crown: Turn it clockwise gently until it is tight and the hermetic seal is active. Do not overtighten.

Maintenance Tips

• Periodically check that the crown is securely screwed in, especially before water activities.
• If you notice that the crown does not screw in smoothly or there is play, have the watch checked.
• The NH35A has a power reserve of approximately 41 hours. If you do not wear it regularly, you will need to wind it manually or use a watch winder.
• Avoid adjusting the date between 9 PM and 3 AM to protect the date change mechanism.

Conclusion

The NH35A caliber is a robust and easy-to-use movement. By following these steps, your PANTER watch will always be on time and in perfect condition. If you have any questions, please do not hesitate to contact us at info@panterwatch.com.