up coil cars

[tjsmrinfo]

I have a Walthers coil car kit that I got at a train show a few years back. The car is yellow with UP reporting marks in red. I've looked on www.rr-fallenflags.org to find this car. My qustion is did the UP have coil cars in yellow with red reporting marks etc?? All I could find on fallenflags site were gray cars with 1 long coil cover and gons converted into coil service in oxide.

thanks

Tom