Now your talking about some of my favorite modern coins.
Ones I suggest to new collectors ... when I am asked at LCS's.
The 1998 S Silver half dollar ( my avatar) came in a
Robert F Kennedy commemorative two coin set.


Here is mine, notice NGC grades the SPxx. (specimen)


There are three of these coins that came with this finish.
You will hear them called specimen or matte proof.
The first, a
Jefferson nickel, came in the Jefferson coin and currency set.

I have read that the mint went with the matte proof for this
nickel so it would match the UNC Jefferson dollar.

Here is my graded 1994 Jefferson .. notice the SPxx grade
mintage 167,703

In 1997 the mint tried this again, with the botanical gardens commemorative set.
It came with a UNC commemorative dollar and matte proof nickel.


Again notice the SPxx grade
mintage 25,000
