Well truth be told the reality is no one owns the 'actual' 50th anniversary submariner. Only Rolex does.
http://www.rolexmagazine.com/2011/06...ubmariner.html
The original first produced 50th anniversary submariner 'prototype' has lug holes. The production ones do not.
So although collectors etc value different serial #s differently the reality is they are all 50th anniversary 'models'.