Photo: Chicago & Alton Boxcar (Circa 1901-1905)

Photo from the Library of Congress:

https://www.loc.gov/item/2016811441/

Scroll to enlarge photo.

Appears to have a grain door.

Bob Chaparro

Hemet, CA

I dunno, looks to me like regular boards nailed against the inside of the door opening. That was a pretty typical practice; I believe dedicated grain doors with paper seals were a bit later than this era.

David Thompson

Regarding grain doors 
--
Ted Larson
Trainweb.org/MHRR   ---   GN in 1965   ---   NASG.org