Hello,
You coin has been listed as Non-competitive; for display only.
There are many factors involved when making the decision to mark a coin as non-competitive in an NGC Competitive Registry Set. These factors may include low mintage, difficulty in obtaining/purchasing the coin, and an unusually high price in relation to the other coins required to fill the set. These factors are considered when our senior numismatic team makes the decision, which is done on a coin-by-coin basis.
We aim to make 100% completion of any registry set attainable for our average collector. If a coin you own is marked as non-competitive, we do offer Custom NGC Registry sets as an option to display all your coins in the manner you desire. If you are interested in an NGC Custom Registry Set, please let us know, and we are happy to assist you. Thank you.