Rolex Cosmograph
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The Rolex Cosmograph Daytona is an officially certified, self-winding chronometer wristwatch with chronograph functions. From its beginnings in 1961, the Cosmograph, Cosmograph Daytona and Oyster Cosmograph Daytona chronographs were produced continuously until 1988, when they were replaced with versions featuring self-winding movements, from Zenith's El Primero caliber, under the name Oyster Perpetual Cosmograph. Since 2000, Rolex began manufacturing its own movements and developed the Rolex 4130 caliber. Due to its limited production and increasing popularity, the Rolex Cosmograph Daytona is considered a rare watch to own.[attribution needed]
