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In watchmaking, the crown, or rather the crown wheel, is an indented wheel which engages the winding pinion and the ratchet wheel fixed to the barrel arbor. The winding crown is a knurled or fluted button of various shapes used to manually wind the watch. Pushbutton crowns are winding crowns which incorporate a mobile pushbutton for operating a chronograph mechanism or a sports counter, or to release the inside cover of a hunter case.