A bit to unpack there.

FGEX was Fruit Growers Express. I would have to work up a list of RR's that used that organization but WP was on the list. Mostly arcane iced reefers and 1950's MR under those marks.

But they had cars with other marks like FGMR. Some of those were built in 1973 and are now ARMN. Still the 50 year mark not that far in their future.

[www.railcarphotos.com]

Railex claimed their cars had fold down racks so you would not need to stack pallets of produce on top of each other. I don't know if that's unique. UP just let's the ex Railex cars they got roam the system.