I checked that electricguitardiscount DOT com site. They have copied most of GC's logo as their own.
On another note, I recently purchased a Ltd B-4Z NS bass and it has tuners and pickups marked ESP. Also, the neck simply has ESP printed on the back. Both of my other Ltd basses have "ESP designed" on the pickups/neck and the tuners are marked Ltd. Is this a counterfeit?
I have an LTD F105 bass and an LTD EX401FM and both has the printed ESP logo. On the bass pickups i have only ESP logo too. I saw LTD guitars with it in shops, so i don't think your bass is a counterfeit.