I've done some research on some of the PRR conversions, in some cases box cars, and in others, as you say baggage or express cars. Some of these were pressed into commuter service for general passenger use in order to meet Wartime traffic needs.
The Hagley Museum has several photos on their site.
Here's a kitchen car:
https://digital.hagley.org/islandora/object/islandora%3A2365377/datastream/OBJ/view
https://digital.hagley.org/PRR_13481
https://digital.hagley.org/islandora/object/islandora%3A2366162/datastream/OBJ/view
https://digital.hagley.org/islandora/object/islandora%3A2366245/datastream/OBJ/view
Early troop sleepers were built by the PRR, too before Pullman Standard began full production.
Troop-Sleeper4 by Edmund, on Flickr
Troop-Sleeper3 by Edmund, on Flickr
IMG_4038_fix by Edmund, on Flickr
I have several issues of the PRRH&TS Keystone magazine featuring articles about the coach conversions. I'll have to sort through them to find them.
Don't forget this
http://cs.trains.com/mrr/f/13/t/265780.aspx
More on troop trains here:
https://utahrails.net/pass/pullman-troop-sleeper-kitchen.php
Good Luck, Ed
Early in World War II, some baggage cars were converted to kitchen cars for service in troop trains. Can anyone point me to pictures of converted cars and/or more info on these conversions?
ChuckAllen, TX