Rory,
Cool,and very good of him to deliver it.
In an interview in Bass Player magazine,it says that Matt Malley had fretted and fretless Series 2's that he kept in his home studio.I'm guessing yours is the latter,it would account for it's 'as new' condition.
I was really surprised when you said how heavy it was compared to your Series 1.It's so long since I played one I'd forgotten.
As is often said here,enjoy it in good health (Preferably on a wide,comfortable strap!).
And don't forget,always lift from the knees!
Best wishes,
Simon.