Mike Dirnt bass 013-8400 first appeared in 2004. Mike spec'd the bass on a '51 P Bass with an ash, slab body with '55 arm contour and pickguard. It had a really thick, maple "C" shape neck with rosewood fret board and was modelled on MIke's original '69 P Bass. The pickup was a Custom shop '59 P bass and had a BadAss 2 bridge. There were two colour options offered black or 2-colour Sunburst.
I bought mine new from Gamblins in Cardiff in 2004. My Mike Dirnt has enjoyed a few upgrades over the years, it now supports a '72 Tele bass Humbucker Pup, a slim '51 one piece maple neck (from a '51 P Bass reissue CIJ) and a Fender Telecaster guitar control panel with vol & tone and 3 position switch to select the Humbucker/ both/ '59 P Pup.
I'll post some pics shortly.
Hope this hepls!