Goldwing, I think the others on this thread have misunderstood your question. You were asking specifically about the FNS 9 and whether it comes with black lettering. The answer is yes, the FNS 9 comes with black lettering on the slide. So does the FNS 40. I have seen some without the black lettering, but not many. I have always assumed that the ones without the black lettering are a bit older than the others. I myself bought an FNS 9 with the black lettering. Here's a picture of it from the store before I brought it home. (We have a 48 hour waiting period on handguns here in Wisconsin.)
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That makes sense because my FNX-9 has "filled engraving" and is older than my FNX-40 which does not.I just got off the phone with FN and they told me that there was a product change and the newer FNS's do not have filled engraving.
The newer ones look like mine below.