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The credit for producing the first keyless watches goes to Antoine-Louis Breguet. On December 30, 1830, Breguet watch no. 4952 was bought by Count Charles de L’Espine. In the pendant it had a knurled button that served a dual purpose: setting the hands and rewinding the watch. The modern winding crown was born. Antoine-Louis failed to patent this revolutionary mechanism, however, and ten years later it was appropriated by a major Genevan watchmaking firm, which claimed it as its own invention.