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Overall view of the the turbine wheels; this is the forward face of the first-stage wheel.

While the first-stage wheel is largely intact (other than missing its center, where it would attach to the shaft; it's possible that this is the set which corresponds to the Smithsonian's turbopump), the second-stage wheel (visible several inches below the first-stage wheel, occasionally obscured by the plastic) appears to be missing many of its blades.

I've never been able to find the diameter of the turbine wheels; the closest I've found is that the F-1's Mark 10 turbopump is described as a "35-inch turbopump" (this in documentation for the F-1A, which would have had a "30-inch turbopump"). Each wheel has a slightly different diameter, so it's unclear whether the first-stage wheel, the second-stage wheel, or perhaps the turbine housing is 35 inches.