Divers find $US 200,000 watch in Neva
The wristband is missing but the mechanism and diamonds remain intact.
The foreign tourist accidentally dropped the limited-edition Hellmuth chronograph into the water last weekend.
The divers brought in special equipment from Russia's Far East on Thursday, saying a search of the riverbed was impossible without it.
The owner had promised a $ US 10,000 reward to the finder.