Watch Fact of the Day: Breguet's Secret Signature: The 18th-Century Anti-Counterfeit Hack
đ Tuesday, August 11, 2026 Faced with rampant counterfeiting of his popular timepieces in the late 18th century, master watchmaker Abraham-Louis Breguet introduced a brilliant security feature. Using a specialized drypoint pantograph machine, he etched an almost invisible âsecret signatureâ directly onto the dial. This microscopic engraving could only be seen at an oblique angle under certainâŚ















