Week 40 and below are the ones that are unlocked yours reads as week 24, you should be able to OC that thing pretty nicely. Remember your setup may hold you back( memory wise that is)
It's an OK stepping, maybe 2500MHz or so if you are lucky.
With that board don't expect too much though, ram will limit you at high fsbs so go get a nforce2 this baby will do 12.5x200 easy with enough juice.
There are no "good" or "bad" steppings, although myth-believers like to think so. Every CPU has unique overclocking properties, but the general rule is that the newer its week/stepping, the more overclocking potential it has.