I just added this Williams PRR tanker to the fleet. Looks like NOS that was never out of the box.
After checking it over and lubing the axles, a shakedown run showed that the wheels didn't roll freely. The car was taken out of service with bad orders, and sent back to the shop. I popped the wheels out and ground down the axle points about 0.20mm which seems to have solved the problem.
I may change the trucks to a better set of sprung trucks. The originals are really cheapies.
I also added an ounce of weight which put it right at NMRA standards.
Bob