Any Hardcore SP Buff & Modeler should be buying the Southern Pacific Freight Cars series of books put out by signature Press. They are now up to volume 4. In Volume 2: Cabooses Photos of wood cabeese in this later era scheme as shown on the model have small data markings centered over the truck on the left side at the short end and centered over the truck on the right side long end. Ths data is low on the car sides. Anthony W. Thompson is the author of these excellent volume's. Nate Goodman (Nato). Salt Lake, Utah .