V-shaped Japanese-style case opener with adjustable claws for winding open and closing screw-back watch cases.
⭐ At a glance
🔧 Type: Case knife/opener, V-shape (Japanese type)
Handle: Cast iron for a firm, comfortable grip
✅ Adjustable claws to suit different case back sizes
📦 Supplied as 1 unit
✔️ Condition: New with tags
🔧 What it does & how to use
This tool is designed for removing and refitting screw-back watch cases and battery covers, making it a handy addition for hobbyist repairers and professional watchmakers alike. The V-shaped claws grip opposite notches on the case back, giving the leverage needed to turn stubborn screw-backs without slipping.
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Adjust the claws: Set the V-shaped jaws to match the notches or slots on the watch case back.
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Position the tool: Fit the claws firmly into the case back notches, keeping the handle square to the case.
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Turn to open: Apply steady pressure and rotate anti-clockwise to unscrew the case back.
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Turn to close: Reverse the motion, rotating clockwise to screw the case back on securely.
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Re-adjust as needed: Reset the claw spacing when moving between different case sizes.
⚠️ Please check that your watch has a screw-back case (rather than a snap-back or case-back requiring a different tool) before use, as this opener is designed specifically for screw-type case backs.
