Nah, it doesn't have a torsion axle.
It has leaf springs (remember, it's a '56). Perhaps the older ones didn't have as smooth a ride as the newer ones (with torsion axles) but they also don't have the same wear issues.
Perfect, sound 13-panel trailer with brand new floor!
I'm going to try to get some photos tomorrow. But really, the exterior is unchanged from when I bought it, though the tongue is clean and nicely painted, as is the rear bumper (which, buy the way, had no rust)!