Quote:This page is dedicated to do-it-yourself slabs or pre-made empty shells that anyone can make at home.
One of the most common certified shells is
Coin World. It is very recognizable by the clear earth symbol in the bottom left corner. It's actually on both side of the case. They make two sizes a normal size which is close to the PCGS or NGC slabs and a smaller version which is closer to ANACS or ACG.
PGS - unknown, name maybe part of INB
INB - International Numismatic Bureau