Demand for Swiss watches has improved, driven by a rebound in Chinese purchases, the head of luxury group LVMH’s watch business Jean-Claude Biver said on Tuesday. “There’s a real rebound in Mainland China and, thanks to Chinese tourists, this will help watch sales elsewhere,” Mr. Biver added on the sidelines of the launch of its new smartwatch. Swiss watchmaker TAG Heuer, owned by LVMH, with its partners Intel Corp and Google on Tuesday launched a connected watch that it hopes will seduce tech geeks and traditional watch lovers alike by letting them swap the connected module for a mechanical movement.