Rolex Yachtmaster Daytona (1965)
Here’s another Rolex that was never offered to the public. The Rolex Yacht-Master would not be introduced until 1992, but thirty years before that, the company had already been experimenting with this 39mm nautical watch. This prototype has been dubbed as the “Yachtmaster Daytona” by watch circles, as it looks more like the Daytona. There are only three pieces known in existence, one of which was owned by Grammy-winning artist Eric Clapton, before it was auctioned off.