Rolex Cosmograph Daytona 16520 Zenith
The Rolex Cosmograph Daytona ref. 16520 is the steel version of the first automatic chronograph made by the maison, which replaces the models with manual winding starting from 1988.
As in the past, the caliber is not manufactured but is the result of the profound reworking of one of the best commercial chronograph watches, in this case the cal. 400 Zenith.
The screw-on buttons and the Triplock crown allow water resistance up to 100m / 330ft.
The bracelet is of the Oyster type with full links, initially with a box closure and a satin finish. Starting from 94, a new bracelet with a shiny central link and a Flip-Lock safety fastener was introduced, while in 1998 the new SEL fixings were adopted.
Through numerous refinements and modifications the Rolex Cosmograph Daytona ref. 16520 remains in production until 2000.

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