By Silke Koltrowitz ZURICH (Reuters) – LVMH’s luxury watch brands Hublot and Bulgari have pushed sales above 2019 levels in the past year and more growth is expected this year on strong U.S. demand, company executives told Reuters ahead of LVMH Watch Week that kicks off on Monday. Hublot and Bulgari, alongside LVMH stablemates Zenith and TAG Heuer, are holding LVMH Watch Week online, with digital presentations of their latest collections. Hublot is showing an extra-slim version of its Big Bang watch, while Italian jeweller Bulgari has Serpenti Misteriosi watches which are hidden in snake-like …