A professional case knife used by watchmakers to open snap-back watch cases quickly and safely. A steel blade and plastic handle make it the essential tool for the workbench.
Product overview
This watchmaker tool is a case knife with a tempered steel blade and a comfortable plastic handle. The thin, slightly bevelled tip is designed to slip between the case middle and the snap-back of a watch and to lift the cover with a controlled lever movement. It is the reference tool for opening any watch fitted with a clip-on case-back, which is the most common system on entry-level and vintage pieces.
Technical specifications
- Blade: tempered steel, bevelled tip
- Handle: plastic, ergonomic
- Compatibility: snap-back / pressure-fit watch cases
- Use: opening case-backs for battery replacement, movement access, or strap repair
- Format: compact, hand-held, lightweight
When to use it
The case knife is used whenever the watch has a snap-back case, recognisable by the small slot or notch on the side of the case-back. It is the tool of choice for the daily work of a watchmaker, and equally suitable for the home enthusiast who wants to change a battery on a quartz watch or open a vintage piece for cleaning. Always check that the case-back is not a screw-back, because using a knife on a screw-back would damage the case.
How to use / install
- Place the watch on a soft cloth, case-back up.
- Locate the small notch on the side of the case-back.
- Insert the bevelled tip of the blade into the notch.
- Apply a firm lever movement to lift the cover.
- Set the case-back aside and proceed with the operation.
- To close, position the case-back and press firmly with the palm or a case press.
Quality & origin
This watchmaker tool is selected, checked and shipped from our workshop in France. Every blade is inspected for straightness and edge condition before dispatch. Orders are usually shipped within 24 to 48 working hours.
FAQ
Can I use this knife on a screw-back case?
No. A screw-back case must be opened with a ball or a case wrench, never with a knife.
Will the blade scratch the case?
If positioned correctly in the notch, no. If forced anywhere else on the case, marks may appear, so locate the notch carefully.
How do I close the case-back again?
Position the case-back evenly and press firmly with the palm or use a case press to ensure a regular and waterproof fit.
Tips for safe use
Always work on a clean, soft surface to protect the case and the dial from scratches. Wear cotton gloves or use finger-cots when handling polished surfaces, since fingerprints can affect gaskets and lubricants over time. Keep your watchmaker tools organised on a dedicated tray and inspect them regularly for wear, burrs or deformation; a damaged tool is the first cause of a damaged watch. After each operation, wipe the tool with a dry cloth and store it away from humidity.
Why choose this tool
This item is selected from a long-running catalogue dedicated to professional watchmakers and to enthusiasts who service their own pieces at home. We test every reference on real watches in the workshop before adding it to the shop, so you receive a tool that we use ourselves. Combined with our French customer support, this gives you a reliable partner for every repair, from a battery change to a full strap fitting.
Is this tool suitable for beginners?
Yes. It is straightforward to use and does not require any prior watchmaking training. We still recommend practicing on an old watch before working on a valuable piece.
Do you ship internationally?
Yes, we ship across Europe and worldwide from our workshop in France, with tracked options available at checkout.
