Vintage Rolex Daytona Movement. The watch is in wonderful condition with a thick case and stretch free oyster bracelet. Due to its very exacting standards rolex made in excess of 200 modifications to the base calibre.
One of the first f series fat hands produced. Rolex used zenith s el primero movement which had been introduced in 1969. While this edition was the first rolex daytona to run on a self winding movement it was based on the zenith el primero chronograph caliber that was then modified by rolex.
The watch is in wonderful condition with a thick case and stretch free oyster bracelet.
This resulted in a longer power reserve and longer service intervals. Rolex used zenith s el primero movement which had been introduced in 1969. The zenith movement was significantly modified in house with over half the components swapped out to remove the date complication and lower the frequency to a slower rate of 28 800bph to achieve a longer power reserve. The movement installed in this watch is a made up valjoux 72 726 which was modified to look like an original rolex 727 caliber.