it was mentioned over at Net54.
Someone claiming a 'clear' SGC slab.

We all assume its a joke.. \:D
A "0' new seller and look at his items he is selling as well...58 mantle, Howe RC, Gretsky RC and 51 Bowman Mantle.

Take a look:
also looking for 52 #311 A variation mantle
ROOKIE CARDS baseball & football.