Case Back Opener

A watch case back opener is essential for inspecting or servicing your movement safely. Whether it’s a screw-down diver case or a snap-on back, having the right opener prevents scratches and pressure damage. Builders working with Swiss ETA or Seiko NH movements often open cases to regulate accuracy or install new case gaskets. The key is using steady torque and proper case-holding tools to avoid slippage.

Read our guide How to Open a Watch Case Safely for full step-by-step tips. Pair your opener with a complete toolkit for professional results. After opening, clean internal parts gently with watch cloths and re-lubricate seals with special oils. You can also explore case replacement options or transparent backs to display your movement upgrades proudly. Every successful repair starts with proper access — and this tool makes it safe.

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