It looks like it is an older StarBass II.
It definitely isn't a Masterbuilt and it's RRP would have been nothing like 6000 odd Euros, so don't worry, it wasn't that good a deal!!
I'm pretty sure I'm right that there didn't used to be a Masterbuilt version, however there now is, and the teambuilt is not a II and does not have bubinga, nor brass frets/nut anymore.
It probably was a nice example though, doubt there is much difference between it and the masterbuilt now.