Boxcar 6753 at Kansas City, Missouri on January 7, 2001 (R.R. Taylor).

This plug-door boxcar was built in January 1968 by General American. It was renumbered 730753 by Burlington Northern and retired in March 1986, after which it was donated to the Smoky Hill Railroad.

References:

• Wikipedia
• Belton, Grandview and Kansas City Railroad Co.