The discovery of a 1942 glass Lincoln in private hands should remind us there are pattern/trials/splashers still out there to find. Anybody have a story to sell? Maybe not of a new discovery but maybe just one that may of been struck and could be out there but currently zero known.
http://blog.gainesvillecoins.com/2016/10/17/glass-cent-pattern-discovered/ In 1942 the US experimented like crazy with new materials to produce Lincoln Cents. One was glass but none were thought to of made it out and survived....until now.
I have found several unknown, unlisted, unseen patterns. but, since I didn't see them, I guess they didn't exist.
I thought there was one glass Lincoln known, but it was broken. This would be the first known intact one.
According to this article: http://www.numismaticnews.net/article/glass-cent-discovered It grades PR-64. How the heck do you grade a glass coin? Kind of like how that ASE struck on a sanding disk got a MS64 or whatever it was.
This isn't a new discovery - it is merely an unbroken one. Anyone who wants to more about these intriguing pieces should read Roger Burdette's "Pattern and Experimental Pieces of WWII." This fascinating tome describes all of the experimental pieces that led up to the silver War nickels and steel Wheaties that we all love. It is a well written and authoritative description of this strange chapter of numismatics.