From my recollection, "Royal Court" & "Gallery" inserts were used as individually-wrapped & serial-numbered box-topper inserts. I had the same Juwan Howard R.C. & a Penny Hardaway Gallery card like that.
There may be two versions of each insert set, since I see many non-serial-numbered Royal Court cards & some of the Gallery inserts have a different number of digits stamped on the back (some have 4, others 5).
It's definitely a "Royal Court" insert, but it most likely was originally seeded as a box-topper.