Henning,
Judging by the turbine that would be a 004A correct? (004B-1 had solid blades as well, but there were still cooling air chanels delivering air externally to the turbine roots outwar -which consequently resulted in poor cooling toward the blade tips) Though as I havent seen the 004B-1's turbine so I'm not sure.
Here's another good read on the 004:
http://www.enginehistory.org/German/Me-262/Me262_Engine_2.pdf
Came up in the
http://www.ww2aircraft.net/forum/aviation/questions-about-me-262-a-15029-6.html thread and I've had it on file for a wile, but haven't read through all of it. It mentions many of the variations in the production 004B, but not which models featured which changes.
So cany anyone give info on the progression of changes throut 004 development, and particularly the differences between the 004B-0,1,2,3,4 and those made on the 004D,E. (and there's also the prototypes to think about; ie 004B-V and A-V)
The only definite differences I know of are that the B-1 had solid (externally air-cooled) turbine bledes (don't know of the B-0) while the B-4 had hollow air-cooled blades. (I don't know about the B-2,3)
And that the 004D had the resonance problems resolved, allowing overrev to 10,000 rpm.
The alloys/metals used seem to vary as well throut development and production. (and not just the hot section) The compressor blades were always stamped aluminum (at least in production models), but the stator blades and intake guide vanse seem to vary considerably both in design and composition. In some cases some of the firs couple stators have with blades made from zinc-plated mild steel (with rearward rows made of aluminum) with others they were all aluminum.
Some versions had some stators with blades constructed with no airfoil shape as well.