The prestige watch selection in Vegas rivals that of the big show in SwitzerlandMove over, Baselworld. There’s another watch fair on the luxury calendar—and we don’t mean Geneva’s Salon International de la Haute Horlogerie. For eight years, JCK Events has ­partnered with Kaiser Time on Swiss Watch at JCK, a five-day, by-appointment-only fair that runs concurrently with the main show in Las Vegas.This year’s gathering will take place June 2–6, says Steven Kaiser of Kaiser Time, noting the show’s new location at Mandalay Bay and the Four Seasons—think penthouse suites and private elevators—where A-list buyers will have the opportunity to mingle with the world’s best watchmakers.“People can expect an unrivaled level of service in a discrete, luxurious environment,” says JCK Events group vice president Dave Bonaparte.Nearly 30 elite brands—including Ulysse Nardin,