Exactly D. Also happened with the 5513's as well. In researching it a little bit more, I did find reference to several models of Rolex's that suffered from the spiderweb dial. It's quite hilarious reading about the "issue" in the gen forums. Most of them absolutely cringe when discussing the spiderweb dial claiming it as being absolutely worthless. Of course, these are the same guys that dislike tropical dials!
Anyways, so far in my research, it seems as though the following Rolex's had issues with the cracking, spiderwebbing or crazing of the laquer: 5513, 16660, 16800, 168000, and the 16550.