COMINGS AND GOINGS>>?Maurice Lacroix has appointed Paul Erhardt managing director of its North American operations. Erhardt previously worked with Jean Richard and Hublot.>>?Ross Markman, former executive vice president of Suberi Brothers, has joined Samuel Aaron (aka the Aaron Group) as director of sales.>>?Jennifer de Winter, the former chief merchant and a 20-year veteran of Saks Fifth Avenue, will join ­Tiffany & Co. as senior vice president, North America on March 1.Katie Dominesey>>?Reed Exhibitions has promoted Yancy Weinrich to the role of senior vice president, overseeing the strategic direction and management of the entire JCK Events portfolio, including JCK Las Vegas, LUXURY, Swiss Watch, JCK Tucson, and LUXURY Privé, in addition to her continued leadership of JCK magazine. JCK Events also recently announced four new hires: Sarin Bachmann, event d