1. Úvod
This manual provides detailed instructions for the safe and effective use of your Watch Case Opener Key Set. This versatile tool is designed for opening and closing screw-back watch cases, particularly those found on Oyster models. Constructed from high-quality, durable stainless steel, this set ensures stable performance and longevity for your watch repair needs.
2. Obsah balení
Your Watch Case Opener Key Set includes the following components:
- 1 x Watch Case Opener Wrench
- 6 x Grooved Dies (various diameters)
- 1 x úložný box

Figure 2.1: The complete Watch Case Opener Key Set, including the wrench and six dies, neatly organized in its storage box.

Figure 2.2: The Watch Case Opener Wrench and the six grooved dies laid out, showcasing their design and individual components.
3. Nastavení
Before using the tool, ensure you have a clean, stable work surface. Identify the correct die size for your watch case back.
- Unpack the Watch Case Opener Wrench and the set of six grooved dies from the storage box.
- Carefully examine the watch case back to determine its diameter and the number of grooves or slots.
- Select the grooved die that precisely matches the diameter and groove pattern of your watch case back. The dies are marked with their respective diameters (e.g., 18.50mm, 20.20mm, etc.).
- Insert the selected die onto the central pin of the Watch Case Opener Wrench. Ensure it is securely seated.

Obrázek 3.1: Detailní záběr view of the six grooved dies, each marked with its specific diameter, allowing for precise selection.

Figure 3.2: The Watch Case Opener Wrench, designed for secure attachment of the grooved dies.
4. Návod k obsluze
Follow these steps to safely open and close screw-back watch cases:
- Place the watch securely in a watch case holder or on a soft, non-slip surface to prevent movement and scratches.
- With the correct die attached to the wrench, carefully align the grooves of the die with the corresponding slots on the watch case back.
- Apply gentle, even pressure downwards onto the watch case back while slowly rotating the wrench counter-clockwise to open the case. Avoid excessive force, which can damage the watch or the tool.
- Once the case back begins to loosen, you can often unscrew it by hand.
- To close the watch case, place the case back onto the watch, aligning the threads. Hand-tighten it clockwise until it is snug.
- Re-attach the appropriate die to the wrench, align it with the case back, and gently turn clockwise to fully secure the case back. Do not overtighten.

Obrázek 4.1: Example of a watch being serviced, demonstrating the type of delicate work this tool assists with, specifically for opening watch cases.
5. Údržba
Proper maintenance will ensure the longevity and performance of your tool:
- After each use, wipe the wrench and dies with a clean, dry cloth to remove any dust, oils, or debris.
- Store the tool and all dies in the provided storage box in a dry environment to prevent rust and damage.
- Avoid dropping the tool or subjecting it to harsh impacts, as this can deform the dies or the wrench.
- Do not use abrasive cleaners or solvents on the tool, as they may damage the finish.
6. Řešení problémů
If you encounter issues while using the Watch Case Opener Key Set, refer to the following table:
| Problém | Možná příčina | Řešení |
|---|---|---|
| Die does not fit the watch case back. | Incorrect die size selected. | Measure the watch case back diameter and select the corresponding die. Ensure the number and spacing of grooves match. |
| Wrench slips on the case back. | Insufficient downward pressure; misaligned die; case back is too tight or seized. | Apply firm, even downward pressure. Re-align the die carefully. For very tight cases, consider professional assistance or specialized lubricants (use with caution). |
| Scratches on watch case. | Tool slipping; watch not secured; improper technique. | Ensure the watch is firmly secured in a case holder. Apply steady pressure and rotate slowly. Double-check die alignment before applying torque. |
7. Specifikace
| Funkce | Detail |
|---|---|
| Výrobce | Obecný |
| Číslo modelu | Genericdm5pube3iv |
| Materiál | Nerez |
| Barva | Stříbro |
| Rozměry klíče | 20 x 1.6 cm (7.87 x 0.63 palců) |
| Die Diameters | 18.50 mm, 20.20 mm, 22.50 mm, 26.50 mm, 28.30 mm, 29.50 mm |
| Hmotnost položky | 336 g |
| Rozměry balení | 23 x 10 x 3 cm |
| Jsou vyžadovány baterie | Žádný |
8. Záruka a podpora
Specific warranty information for this product is not provided in the available documentation. For any product support or inquiries, please contact the seller or retailer from whom the product was purchased.