Primal Gladiator's Ornamented Clasp is part of the transmog set Primal Gladiator's Scaled Armor (Paladin only), which the Appearances collection lists in 2 versions. The other 13 pieces:
Items Numbered Next to Primal Gladiator's Ornamented Clasp
Blizzard numbers items as they are created, so the named items next to ID 115898 (115893 to 115903) were usually added in the same batch as Primal Gladiator's Ornamented Clasp: the same quest line, zone, vendor or reward set.