KEEPING TIME: A fine watch is so Cary Grant in "Charade"; you practically want to don an elegant gray suit with skinny black tie, rather than just some old jeans. Tourneau, which has been making lovely time pieces for over a century, works well with an elegant gray suit, or gym shorts, too. Good thing, then, that the company is having a huge sample sale, Wednesday, March 10th through Sunday, March 14th, at the Sofitel. Discounts are notable -- try up to 75 percent off. Maybe we can get a watch for elegant outings and one for the gym-short days, too. JEWELRY, TOO: All sorts of baubles and clockfaces to browse from.