More from David Gersic.
" Thanks. I'm trading email with Federico Croci about this. It's also news to
him that any alternate backglass exists. He's wondering if you can get a good
clear high resolution shot of the backglass. He'd like to show it to some of
the people he knows that used to work at the Zaccaria factory to see if they
know (and can remember) anything about this. "
It will be interesting to see how many were made with this glass.
Ian