I don't know if I've posted this before or not, it's from an 8x10 Negative I found tucked in among my Sams folders, pretty sure I bought this on eBay some time back and forgot about it.
I don't have a scanner capable of scanning a negative this large so for now I propped it up against the monitor displaying a white screen and took a picture of it.
I want to get it professionally scanned and see if there's enough detail to make a repro of that Dynamic Demonstrator.
There is another copy of this on the ETF Site,
http://www.earlytelevision.org/lasalle.html
The close ups look pretty clear.