President Elect Barack Obama's Secret Service Watch
According to OnTheDash.com:
"On the occasion of his 46th birthday, on August 4, 2007, Barack Obama received a gift from the Secret Service agents who had been responsible for protecting him during his Presidential campaign–a large, black-dialed chronograph bearing the shield of the Secret Service. This chronograph was purchased by the Secret Service agents in the Secret Service employees' store, located at Secret Service headquarters in Washington, D.C."
Here is a close up shot of the watch with the Sercret Service Logo. Click on it for more detail.
To learn much more about President Obama's watches click here.