Gary Laasko wrote:
"This picture appears to be the B end of a rebuilt NKP (only the N on the reporting marks shows) double sheathed boxcar:
https://www.loc.gov/resource/fsa.8d12117/

Fail. The car has NOT been rebuilt, and you can make out an oval on the car side. NOT NKP, but NYC, specifically NYC 234700-234945 (ex-T&OC 14000-14249), Lot 386-B USRA DS boxcar


Ben Hom