Looks like an Anniversary electronics + mastervolume to me...
Ad says:
This bass is ready for Series II electronics with the modification of Q switches instead of CVQs so already comes factory with the 'dummy' humcanceller installed, all routing factory done and a lightweight hollow body as Series II.
There's no 5 pin output, looks like the mono/stereo switch is there. Also it looks like there are now screws to hold the preampcard...
Edit:
I understand the confusion so we can't talk strictly about a Series bass or a Signature Deluxe, this bass was a custom order, not a regular Alembic, the starting point in mind was a Series II (hollow body, dummy' humcanceller, Series serial, etc) but was overmuch expensive and finally the original owner picked a downgrade with Series I electronics and any Signature Deluxe specifications to deflate the bill preserving many other top specifications.
I would love to see some pictures of the electronics to prove that...
(Message edited by fc_spoiler on November 25, 2009)