Caris LeVert's super rare watch was allegedly stolen at a party earlier this month ... and now, TMZ Sports has learned the Cleveland Cavaliers forward is asking cops for help in getting it back.
Law enforcement tells us ... LeVert told cops it all went down on Aug. 1 during a bash at his Los Angeles-area home.
According to cops, someone was seen in LeVert's bedroom during the festivities ... and when the hooper went to check out the situation, he noticed his watch case was open and his $93,000 Peugeot was missing.