IWC Cal. 431 5443 Setting lever screwIWC Cal. 431 5443 Setting lever screw. The Setting lever screw is an authentic part from a watch movement by IWC. Set your timepiece apart with precision. Introducing the IWC Cal. 431 5443 Setting lever screw, an essential component for ensuring the accuracy and reliability of your IWC watch. Crafted with meticulous attention to detail and the highest standards of precision, this setting lever screw is designed to seamlessly integrate with your

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