The "thru-truss" (I've seen this type of "topless" bridge referred to as a "pony-truss")
turntable bridge was popular with the SP, also. It was found everywhere, I believe, but
for some reason was more popular out West than in the East, so far as I know.
Not sure why; it does allow for a shallower turntable pit, as much of the strength can be
above the track rather than below it.
You can fake it with any turntable, I guess. Below is a bad photo I found on file of my
scratch built (and still needing some finish work, as is obvious) 30" turntable.
The trusses are Atlas HO bridge pieces that I got for 50 cents at a train show. A better
job could be done, but I'm OK with mine (I think that I'll repaint the structure
in something approaching black to hide my rather crude detailing...).
BTW, the loco (K-line, former B&A Berk) is accurate in that the NYC/B&A sold two
of these locos to the Tennessee, Alabama and Georgia when the B&A dieselized.
They outlived their compatriots up North. The tenders were former NYC Hudson
units.