Launched in 1945 to commemorate Rolex's 40th anniversary, the Datejust was the very first self-winding wristwatch to feature a date window – a simple but essential complication for many, which would be enhanced by the Cyclops lens just three years later. It was also the first Datejust that introduced the Jubilee bracelet into Rolex’s catalogue. Today, despite the hype surrounding sports watches, the Datejust remains Rolex’s best-selling model.