No. If you bought a high end watch from a shady dude well below market price and without any papers, you could be found guilty of a crime (posession of stolen g

No. If you bought a high end watch from a shady dude well below market price and without any papers, you could be found guilty of a crime (posession of stolen goods) before the law changed as well as after the law changed. Nothing has changed there. However, if you bought a used watch at a reasonable price with some plausible documentation, this is where things has changed somewhat. Before, if you had bought the watch in "good faith", i.e. there was no obvious reason for you to suspect it was stolen when you bought it, you were entitled to keep the watch even if it was later found out it was indeed stolen. Even if they later found the previous owner, he wasn't allowed to have it back. He had to go after the thief to get compensation (even if the thief is unknown). That last thing is what changed. If they find out the watch is indeed stolen, you have to give it back to the previous owner, even if you bought it in "good faith". But you have not committed a crime, you will simply have to give back the goods to the right owner. Now it is you as a buyer that has to go after the thief for compensation (because he scammed you by selling stolen goods).