In 1956 Rolex introduced a model (ref 6510 and 6511) that could simultaneously show both the day and date on the dial. It was the flagship… | Instagram
![Day-Date, Ref 6511, First Generation Rolex, 'Oyster Perpetual, Day-Date, Officially Certified Chronometer', Ref. 6511. Made in 1956. Very rare and fine, early, tonneau-shaped, center-seconds, selfwinding, water-resistant, 18K yellow gold wristwatch ... Day-Date, Ref 6511, First Generation Rolex, 'Oyster Perpetual, Day-Date, Officially Certified Chronometer', Ref. 6511. Made in 1956. Very rare and fine, early, tonneau-shaped, center-seconds, selfwinding, water-resistant, 18K yellow gold wristwatch ...](https://antiquorum-swiss-assets.s3.us-west-2.amazonaws.com/images/204/lots/81/81.jpg)
Day-Date, Ref 6511, First Generation Rolex, 'Oyster Perpetual, Day-Date, Officially Certified Chronometer', Ref. 6511. Made in 1956. Very rare and fine, early, tonneau-shaped, center-seconds, selfwinding, water-resistant, 18K yellow gold wristwatch ...
![Rolex Day-Date 60th Anniversary Edition, the President's Watch with Green Dial (hands-on, specs & price) - Monochrome Watches Rolex Day-Date 60th Anniversary Edition, the President's Watch with Green Dial (hands-on, specs & price) - Monochrome Watches](https://monochrome-watches.com/wp-content/uploads/2016/07/Rolex-Day-Date-6511-from-1956-First-Edition.jpg)