I opened the slab and pulled the coin out. I believe it is an American Silver Eagle, it passed magnet and weight test. The Toning looks faked. But I'm not an expert on Toning. Thanks for all the info.
Also the NGS of the OPs slab (Numisttrust holder) is not related to NuGrade/NGS that used the TruGrade holder.
Not everyone who used the Numistrust slab is inter-related other than by choice of slab. My bucket (note that they don't warrant an album) of NTC style holder users has 17 names... Most prominent is probably NNC (centsles fame on fleaBay). One of my "someday" projects is tracing them through the internet archive. Start here: https://web.archive.org/web/20010722044112/http://www.numistrust.com/ to here: https://web.archive.org/web/20071026083340/http://www.numistrust.com/ After which the domain (2008) becomes a Japanese apartment sales site.
I would assume that you're keeping the coin forever and not trying to re-sell it. If so, the NGS or unknown grading company's slabbing would be of little to no value.
OK, you made me dig... There are four styles of labels. It's not clear whether they are from the same company. NGS2 - brown border, globe FRONT 53467 (up thread) The 2015 coin date is a lot later than I thought I would see and makes it much more likely to be one company that decided to go for a kicky yellow label for the pop. (reverse as NGS3) The only traces I've found is a New York State business formed on 2006-01-19 in East Meadow NY. And the domain history showing the website was created on 2007-05-01 and again in 2008-09-01. No useful captures in archive.org.
How dare you impune the reputation of NGS without knowing about them! I say this because I am also the operator of an INDEPENDENT grading service, my very own highly reputable grading company, NERFGS - (Not Even Remotely Flaky Grading Service). So my service is not well known... but that's no reason to put it down! When submitting coins to my grading service, I will: 1) Give your coin an alphabetic grade that everyone's familiar with from high school (A, B, C, D, F) based largely on how I'm feeling that particular day. 2) Securely place the label directly onto the surface of your coin with 2-ton adhesive (no more of this "plastic slab" silliness). 3) Lose your coin somewhere in this mess of a room of mine, upon which I will 4) Call you so that you can travel to my home address to help me find it here somewhere (cuts down on return shipping fees!) With competitive pricing and a dead-link website (http://www.nerfgs.com/), NERFGS is a leader among the "so-called" less-well-known grading services.
I admire your return shipping policy. However, I'd highly suggest that the second version of your slab includes encasing the coin in lucite. That way, it's nearly impossible to crack out, ensuring the enduring safety of the coin.
Aw, you guessed it. I'm already working that, of course. It will include an initial food-saver bag layer before the lucite. I'll have to revamp my pricing structure, though.
Well, to be polite about most basement slabbers, there is - somewhere - a coin with that grade. Just not the coin that is in the slab.