I just picked up a z serial 14060M which came with an interesting warrenty card (one I hadnt seen before). The card only contains 3 peices of info rather than the more typical 4. I did some digging and it looks like Rolex made 2 versions of these cards when they released them in 2007.
Some pics comparing them can be found here :
http://jholbrook.proboards.com/thread/2286
Has anyone else seen cards like this ship with the 2 line (non COSC) 14060M? Does anyone have more info on why certain models got one version of the card vs. another?