The original USRA gons used a windup shaft mechanism for the doors. Wine door locks were used on a number of copies built in the 1920s, and sometimes retrofitted to the originals. David Thompson

Something is wrong here. N&W 84300 was a 50-ton twin hopper in 1945. David Thompson

The end ladder is correct; it's the three side grabs that are too low. David Thompson

Here's a 1917-built car reweighed at "BFO": http://lists.railfan.net/erielackphoto.cgi?erielack-12-09-19/X4529.jpg David Thompson

500 of the class BL were rebuilt to class SK stock cars. The other 500 were renumbered to 42000-42790 (some numbers were not used). David Thompson

Very similar to the door on this X26: https://www.lakestatesarchive.org/ICRR-8x10-sheet-film-negatives/i-txB4JvQ/A David Thompson

You're a year too early. Southern sent 100 of their AAR '37 boxes to A&EC in 1954. This may be the first time Intermountain has run the A&EC scheme, but I know it's been done before in HO (probably by

X29 doors are too short; that's why PPR used doors from the (taller) X28. F&C offers a resin kit (#8201 and 8203) with this door style. David Thompson

Photographs show 24589 (1/53), 25200 (5/53), and 28500 (5/56), so it is likely the N&W-built groups in 24561-25499 (1953) and 28500-29999 (1956). David Thompson

That one is a Cambre radial- different panel count. The roof on the D&RGW box appears to be a Murphy radial; I'd recommend cutting off and shortening the roof of the MDC 50' s/s auto box. David Thomps

These are the AMC version of the 1920s ARA steel-sheathed box, with the "innie" version of the early Dreadnaught end. This drawing shows the taller Dreadnaught end on N&W class BT, but the general pro

I'm inclined to think this is someone's outside metal roof, and not any sort of all-steel roof. David Thompson

Both CGW series had the "Murphy" radial roof, which is very similar to the Hutchins radial roof except for lacking the indentations in the corners of the seam caps. David Thompson

O&W didn't have much to do after their anthracite traffic collapsed in the 1940s. The 7/50 ORER shows 234 hoppers, 35 gondolas, 34 box cars, and 11 flats; versus 2803 hoppers, 202 gondolas, 58 box car

I assume this is the Bethlehem mill gon? I expect there are a number of B&O paint schemes they haven't done yet. David Thompson

RF&P 16 was one of series 11-18, conversions of the series 7001-7062 70-ton twin hoppers RF&P bought secondhand from B&LE in 1972 to replace its steam-era hopper fleet. David Thompson

Here's another raised-roof box. https://donstrack.smugmug.com/UtahRails/Emil-Albrecht-Photos/1947-Oct-Salt-Lake-City/i-Tnq2XQp/A David Thompson

Looks like there is already some corrosion along the bottom of the side sheets. David Thompson

I have no idea why he said that. The car in the pics is pretty much a standard AC&F Type 4. David Thompson

The underframe is a typical ACF Type 27, as is the tank. The vertical rivet rows are for the internal bulkheads that separate the tank shell into two compartments. David Thompson