The Rock Island used this unusual truck under the 10 aluminum express boxcars built in 1945, 20060-20069. They are essentially like the Bethlehem Kit Bits number 1213 including the Timken Roller Bearings. It also looks like the Barber S-5-L shown in Richard H's MRH truck article in figure 56, except with Timken Roller Bearings instead of the solid bearings shown there.
What I am curious about is whether anyone can point out other roads using this truck?
