On Jun 2, 2010, at 11:31 AM, rwitt_2000 wrote:

Can anyone provide information about these three GTW boxcars? The
50-ft
former automobile car appears to be in express service at the time of
the photo. The steel underframe car also appears to have been built
for
auto service based upon the 1-1/2 door opening. I am not sure the plug
door one is in the STMFC era.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170492093611

GTW 576631 was in the 576000-576999 series, all of which were in auto
engine service (note the stenciling which reads "specially equipped
for automobile engine loading"). There were 50 cars in the series in
1943, but the number diminished steadily until only 3 cars were left
in 1950. The car in the photo had arch bar trucks when photographed,
and those would have had to be changed to cast steel trucks by 1941.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170492082003

GTW 11498 was in express box car service and thus wasn't in the
ORERs. It was obviously one of the end door 50' auto cars built ca.
1941 that was either originally intended for, or converted for,
passenger service, as is evident from the Commonwealth high speed
trucks.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=170492085140

You're right, this was built or rebuilt well past the STMFC era.

Richard Hendrickson