DECEMBER 2007: THE O LIST HOLIDAY GIFT GUIDE: $100-$300. Your Shining Hour. Who Could Use It: The business partner who has many virtues, of which promptness is not one. Why it’s an Opportune Moment: Squarish vintage-derived watches are done up with burnished metallic straps and bezels. A hint of glint at the wrist marks the holidays without making you look like a Christmas tree. Where to buy it: TKO Orlogi Rivera watch, $135 each; henribendel.com