It COULD be a modded T3 to T34 spec, though!!
I have a T3 "looking" turbo but is T34 inside, as you can see from the piccie the T34 inlet gets MASSIVELY narrower at the trim wheel entry end, no larger than a T3 infact, and that is why I had mine machined out inside the comp housing to accomodate a T34 trim wheel.
I don't of course know whether this is the case above, just that it could be.
But externally certainly is a TO3/T3.
tabetha