The most common fake Rolex models floating around are the Datejust, the Submariner, the GMT-Master II and the Daytona. Very old unpopular Rolex models are very unlikely to have been faked, so if you see a tiny 1940's Rolex cocktail watch, it's probably real.
It seems even the wealthy are exercising caution, cutting back on their discretionary spending and selling their Rolex watches and Herms bags to raise cash. Whether a smart and strategic move or panic selling based on fear of the unknown, the outcome is the same.