I had originally thought that the strap shown on
the below page was the one Lucas wears in MacGyver, but after looking at the above picture I can see now that it's the same style of strap but not the exact same strap.
There is however some interesting information about the "cuff" style of strap, so if your at all interested in watches, or just curious, click on the below picture to link to the page.
Photo: A blog to watch