On a totally different topic, Rufus had posted a shot of an early "LCL" container with an arched top over on the traction photo thread. I didn't recall noticing that before, which got me to poking around. Saw these photos in Railway Age, April 8, 1921:

My understanding is the New York Central was a pioneer in the development and deployment of the container concept. These look to be of wood, in large and small sizes, featuring an arched top. Very cool.
Here's a few MTH LCL containers stuffed in a refurbed Lionel 812 gondola on the basement pike:

Slightly rounded tops here.
Healey





