Lionel and 3rd Rail have both offered 1:48 PRR S2 steam turbines (I assume that you mean this loco and not the MTH "Chessie" steam turbine). Both were nice. The 3rd Rail version is much older and is brass. I have the modern Lionel version. Very nice.
If memory serves....the first Lionel Scale 6-8-6 PRR turbines were brought out long enough ago that they had AC Pullmor motors in them. They run poorly compared to the later ones, so be careful. They are probably cheaper, though, and will do a job of sorts. The Pullmor version looks just as nice as the later version.
