Eldon,

It looks like the gon has W&LE number 70570. These were built in March and April of 1916 by Standard Steel Car and Pressed Steel Car. This design seems to have been a major influence on the USRA mill gon design. W&LE series 70000-70599 was 597 cars of 46-foot length. 70-ton capacity, all-steel construction, 3-foot interior height, and 12 exterior posts. This car and more of the W&LE 1926 freight car fleet were just reviewed at my blog:
http://designbuildop.hansmanns.org/

The page text for the Critical Past film clip notes these cars were an "extra long railroad car". As the film was shot in 1918, a 46-foot car would be longer than most gondolas of that time.

I've got nothin' on that gun tube.

Eric



Eric Hansmann
Chagrin Falls, Ohio