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![Rolex] Zenith-era Daytona ref. 16523 fitted with a COSC testing dial : r/Watches](https://external-preview.redd.it/7PfwQ6BvBL34QYOv4PirUwLyCuw8BaxqzmhvWCsE7ms.jpg?auto=webp&s=2ff988d7c55c8aa19074a200786779fe44fb30e8 "Rolex] Zenith-era Daytona ref. 16523 fitted with a COSC testing dial : r/Watches")
Rolex] Zenith-era Daytona ref. 16523 fitted with a COSC testing dial : r/Watches
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