Description: Rolex Day-Date 40 ref 228238 Pre-owned Rolex Day-Date 40 ref 228238 (2017). When Rolex introduced the Day-Date back in 1956, it was the first wristwatch to display both the full day of the week spelled out at 12 o’clock and the date at 3, a bold move that cemented its place as the “President’s watch.” Fast forward to 2015, and Rolex refined the formula with the Day-Date 40, replacing the earlier 41mm version with better proportions and debuting the next-generation