I am a huge fan of Canadian silver coins and enjoy displaying my competitive coins in the NGC Registry. These coins are typically easier to find in ICCS holders than in NGC slabs. The large Canadian auction houses list almost all their coins in the ICCS holders, generally with additional adjectives like GEM, Superb, etc. Beware. Their goal is to get the highest bids possible, not to accurately describe the coins. I just had 7 Canadian silver dollars from 1949 to 1967 crossed from ICCS to NGC. The original grades ranged from 64-66. Two crossed at the same grade and one crossed from 64 to 65. The other 4 crossed lower; one by two grades, 65 to 63. A simple rule, which I will follow, is Never buy a coin sight unseen if it is in an ICCS holder. Probably a good rule generally.