According to Bob's Watches, Ryan often wears a vintage Rolex Daytona Reference 6239. The popular watch blog spotted him wearing the watch to the Golden Globes. Here is the same watch below worn by Seacrest when he hosted a USO function.
|Ryan Seacrest Rolex|
|Photo By Chairman of the Joint Chiefs of Staff from Washington D.C, United States (161020-D-SW162-0288) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons|
Emulating the Style of Ryan Seacrest's WatchIf you had money and wanted to recreate the Ryan Seacrest look, it would be a simple matter of finding a similar Rolex watch. On mere mortal salaries, it's a bit more of a challenge to emulate the look of the Ryan Seacrest Rolex. However, finding all black subdials and a white dial can be a bit of a challenge. In my opinion, this Invicta Speedway comes closest.
Another similar watch is another Stuhrling Original Monaco Quartz Chronograph with white dials on a dark background.