i was convinced that this copy was actually supposed to come in a plastic sleeve (as shown here on spfreaks.com), but that someone moved it into a jewel case.
just pay attention to the insert: it’s too big for the jewel case.
also, the general rule in that time was: uk promos come in plastic sleeves, us promos come in jewel cases. this is a uk promo. so…
and yeah, there are a lot of different cds. i’m not sure what the exact story is here.