--- In STMFC@..., Richard Hendrickson <rhendrickson@o...>
wrote:

Note that the ends on both types had square

corners until late '39/early '40, after which they had W-section

corner

posts and round-cornered ends.

Richard et al:

OK, now that this has been posted, I am really going to stick my neck
out and ask something that has bugged me for about eight years.

What exactly is this difference? I have looked at both versions of
the prototype and models and I just do not see it? The only thing I
can see are some are flat at the bottom, others have a small triangle
at the bottom, but a "W"?

Honestly, I am terrible at having something "described" to me or
told "it looks like a man's hat but upside down (etc)" and making
sense of it, so I am sure that is at play here.

Thanks-

Garrett Rea
Nashville, TN