Kind of hard to see exactly what you have circled.
Same here, Mike - that's why I asked for input.
Just for clarification: I was not not referring to the rectangular sheet metal (steel?) objects between endbeam/siding and the truss rod washer on WW&F boxcars.
My curiosity got triggered when mulling over the purpose of the rectangular patches on the lower corners corners of 309's *sides* and the fact that they are today no longer there. The photo in Wiscasset shows 309 in good shape, so I excluded that they were patches applied to quickly cover rotted siding. The shadows indicated a significant material thickness, pointing more towards wood boards as material as opposed to sheet metal. (Please remember, I am still discussing the car *side*.)
When guessing that the patches may have been siding reinforcements to protect from poling damage, I wondered whether there might have been similar patches protecting the end corners.
Unfortunately, I have not yet seen any clear photos of 309's ends while still in active duty. Or shortly after arriving at the Ramsdell farm (early photos would be most helpful, as during almost 60 years of storage alterations to such minor parts may have occured easily).
The closest one I found was the enlargement I posted and even that doesn't show an end patch clearly, only a shadow line of where such a patch *may* have sat and removed/rotted since.
I am familiar with the metal corner braces you mention on i.e. the TCDA cars and they are clearly distinguishable. However, I believe on 309's corners we see something different. As said, the shadows indicate in my opinion a thicker material, pointing more towards wood scraps then metal. Furthermore, I can't identify on the photos how the items were fixed to the siding on 309. This suggests to me that they may have been nailed, pointing again IMO more towards wood as material.
But then again, if their purpose was the same, then there surely must have been similar patches/boards/plates on 309's ends?!
Let me also state here how much I appreciate your and everybody elses' input on this matter.
Wolf-Jobst