I clicked on the link and nothing is listed anymore.
Tunnel? Perhaps the Holy Grail is buried in Auntie's backyard too! Just kidding ;) I'd be interested in hearing the update about the tunnel :)
Didn't I hear that there have been a few Chinese counterfeits that have slipped through certification and grading at TPGs? If this is true, then...
I'm no metallurgist, but couldn't repetitive and rapid freeze-thaw cycles produce this result?
Well, I suppose if the specimen was minted in 1570, people have been burying coins in the Aunt's back yard for nearly 400 years!
I suppose if Heritage auctioned it, it was somehow authenticated as a true split planchet.
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