Is This 1987 NGC 20th Silver Eagle legit?

[Capone1929]

I looked this 1987 US silver eagle MS68 up on NGC registry and it had the right coin and grade #ed 2005/2005 but showed none graded, photos, or price, but did say 20th 2005/2005 1987! Is this because it was in a set and graded as a set and not as a single? The slab is not loose, kinda does but doesn't appear to be tampered with slab is solid seems authentic! Why is this or is this simply a wrong serial # on an authentic, a genuine NGC or fake slab? why is this? Thank You for any help. Capone1929

[Capone1929]

10 minutes ago, Capone1929 said:

I looked this 1987 US silver eagle MS68 up on NGC registry and it had the right coin and grade #ed 2005/2005 but showed none graded, photos, or price, but did say 20th 2005/2005 1987! Is this because it was in a set and graded as a set and not as a single? The slab is not loose, kinda does but doesn't appear to be tampered with slab is solid seems authentic! Why is this or is this simply a wrong serial # on an authentic, a genuine NGC or fake slab? why is this? Thank You for any help. Capone1929

Has lil plastic slag on seal but its attached to original slab

[Morpheus1967]

I believe the 20th Anniversary label refers to the 20th anniversary of NGC.  Makes sense, since it is a 1987 eagle, the year NGC was founded.  Just my guess though.  

[Capone1929]

22 hours ago, Capone1929 said:

I looked this 1987 US silver eagle MS68 up on NGC registry and it had the right coin and grade #ed 2005/2005 but showed none graded, photos, or price, but did say 20th 2005/2005 1987! Is this because it was in a set and graded as a set and not as a single? The slab is not loose, kinda does but doesn't appear to be tampered with slab is solid seems authentic! Why is this or is this simply a wrong serial # on an authentic, a genuine NGC or fake slab? why is this? Thank You for any help. Capone1929

Has lil plastic slag on seal but its attached to original slab, 

Thank you for your reply Morpheus, I knew what the 20th was and is I was talking about how it was listed under the NGC registry and Census, however I contacted NGC directly via email through the NGC app and emailed the people that verify fakes, frauds, counterfeit, etc., Through that department of customer service and they verified it is listed, it is in fact authentic, and there just isn't a NGC book value on it do to it being one of a kind! Such a relief, Thank you for the reply, as well as other members inputs are not needed on this topic now, as it has been verified as Genuine! Thanks again Sincerely, Capone1929

[Six Mile Rick]

Many modern coins or high grade that have not been sold at auctions to show their selling value will not have a suggested price value in NGC records..