How to Open an Automatic Watch with a Notched Back: Practical Guide
Opening an automatic watch with a notched back requires a slightly different approach than other types of cases. The notched back is often used for waterproofing purposes, and care must be taken not to damage the internal mechanisms or the case when opening. Here are the steps to safely open an automatic watch with a notched back.
1. Prepare your equipment
Before you begin, you will need a few specific tools to open a watch with a notched back:
- A Case Back Opening Tool : This tool is designed specifically to grip and turn case backs without damaging the case.
- A small flathead screwdriver : If the bottom has additional screws (less common for notched bottoms, but possible).
- Anti-magnetic tweezers : To handle the battery and internal components without risk of disturbance.
- A soft cloth : To clean your watch after opening.
- Microfiber gloves (optional) : To avoid leaving fingerprints or dust on the watch.
- A new battery : If you are replacing the battery, make sure you have the correct part number.
Our tools: https://masar-shop.com/collections/tools-to-open-bottles
Batteries: https://masar-shop.com/collections/piles
2. Place the watch in a stable place
Place the watch on a clean, stable surface. Use a watch mat or small stand to protect the watch from scratches. This will allow you to work more comfortably and prevent damage to the case.
3. Use the notched bottom opening tool
Notched bottoms are designed to be opened with a special tool. This tool, often key-shaped with a wide notched opening, allows for uniform leverage.
- Position the tool : Insert the opening tool into the notches on the back of the watch. The tool should fit snugly into the notches to provide a secure grip.
- Turn gently : While holding the tool firmly, turn it counterclockwise (about 1/4 turn) to loosen the bottom. Do not force the tool if you encounter too much resistance. This could mean that the tool is not inserted correctly or there is another problem.
4. Open the watch case
Once you have turned the opening tool and the back is loose enough, you will be able to remove it by hand. Be sure to do this gently so as not to scratch the case or force the case open.
5. Remove the old battery or replace the internal components
Once the case back is removed, you can access the internal mechanism of the watch. If you are changing the battery, remove it carefully with anti-magnetic tweezers. Handle all internal parts with care to avoid causing damage to delicate components.
6. Place the new battery
Insert the new battery into the battery compartment, making sure to respect the polarity. Check that the battery is properly seated and that it makes good contact with the connectors.
7. Close the watch
- Place the notched back in place : When you are finished handling the internal components, align the notched back with the watch case.
- Use the opening tool again : To close the watch, place the opening tool into the notches on the back and turn it clockwise to lock it in place.
8. Test the watch operation
Once the case back is replaced and properly secured, check that the watch is operating normally. If it is an automatic watch, make sure the hand movement is smooth and stable.
9. Cleaning and maintenance
Take the opportunity to clean the watch and remove any dust or fingerprints from the case and dial. If your watch is waterproof, remember to check that the case back is securely closed and that the gaskets are intact before putting it back on your wrist.
Additional tips:
- Be careful : Automatic watches are often delicate pieces with complex movements. Do not rush opening and assembly to avoid damaging the internal components.
- Check the water resistance : If your watch is water-resistant, it is essential to check the integrity of the seals before closing it. If a seal is worn or damaged, replace it immediately to prevent water infiltration.
- Use the right tools : Using the case back opening tool is essential. Without it, it can be difficult to open the watch without risking damaging the case.
Conclusion
Opening an automatic watch with a notched back requires some practice and specific tools, but with patience and the right steps, you can easily replace the battery or make minor repairs. Be sure to work carefully to preserve the integrity of your watch and avoid any damage to the internal components.
