QUOTE(Mark Stilson @ Sep 24 2007, 04:10 PM)

Older slabs (Green label ten digit serial number.) seem pretty good, newer slabs

probably over graded.
Last year on a bet I opened 10 of my PCI Slabs (all recent submits of the last 2 years or so) and resubmited them to PGCS (The so called best)
7 came came back with the same grade, 1 came back graded MS-63 and PCI graded it MS-62 and another came back as MS-65 and PCI graded it MS-63
The Last one came back a 1883 with cents Liberty Nickel graded AU-55 and PCI had MS-60
All together it was very close and I won the bet 50 dollars plus all grading fees