They sure did, I’ll see your link and raise you one! [:P]
The Thrall 63’ were introduced in 1977, perfect for my era which is why I bought 5 of them in BN, UP, WP and two MILW.
https://www.trainorders.com/discussion/read.php?3,2797499
https://exactrail.com/products/thrall-63-opera-window-center-beam-flat-car-bn
Well played Rio!
Since we live stone’s throw from each other, we need to sync up.
Because the OP seems to be interested in accuracy in modeling the car type in serving this lumber yard, correct road names are as important, in setting this scene. The predominant manufacturer modeled in HO, is FMC. Atlas is going to re-run the 5077 cu. ft. double door exterior post car. Prototype operaters of the plate B, 5077 were Western Pacific, McCloud River, and Hartford and Slocomb, all running the cars with centered Youngstown doors. City of Prineville, Camino, Placerville, and Lake Tahoe, Sierra, and Union of Oregon ran the cars with offset double Youngstown doors. Some WP cars had their Youngstown doors replaced with off color doors that looked like Superior brand doors. Atlas also offered the 5503 cu. ft. double door exterior post car that was mainly a Southern Pacific car as they ordered all 700 but, according to “FMC Boxcars Since 1972” by Eric A. Neubauer, some were lettered for the Longview, Portland and Northern and, the Amador Central, both lumber roads and, SP connections. The 5347 cu ft car built on the same basic design as all the other FMC “lumber” cars was operated by East St. Louis Junction, Galveston Wharves, and lumber lines, Oregon, Pacific and Eastern, Port of Tillamook Bay, and Yreka Western. These cars had offset Youngstown doors. The other “lumber” boxcar is the 5283 as offered by Intermountain. The double sliding door cars were predominately Southern Pacific and Cotton Belt, carrying forest products to destinations all over the country.
Because most of these cars operated by shortlines were products of the incentive per diem era when some operaters had more cars than track to hold them all, the cars carried their non-traditional paint jobs on to second, third, fourth and more operators. In the early 1980s, most were still under their original reporting marks and, would lend accuracy, and color to your lumber operation.