I never knew about this thread. Sorry to open it again, but I am the guy that ended up with the backglass via Ebay.
I have Gottlieb El Dorado and thought that this would be a great acquisition. Turns out that the dimensions are off and will NOT fit in the GTB El Dorado backbox. Oh well, a conversation piece!
It did survive the trip from South America to the SF Bay Area. I was doubtful, but pleasantly surprised.
I got the glass out of storage and wanted to share more pictures of it for those of you who wanted to know:
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