Grievous Gladiator's Leather Helm is part of the transmog set Grievous Gladiator's Leather Armor (Rogue only), which the Appearances collection lists in 2 versions. The other 6 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Grievous Gladiator's Leather Helm Fits
Other Items Named Grievous Gladiator's Leather Helm
4 other items in the current build are also called Grievous Gladiator's Leather Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Grievous Gladiator's Leather Helm
Blizzard numbers items as they are created, so the named items next to ID 100435 (100430 to 100440) were usually added in the same batch as Grievous Gladiator's Leather Helm: the same quest line, zone, vendor or reward set.