Read from the World of Warcraft client build files.
How Moonpriest's Coronet Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Moonpriest's Coronet suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Moonpriest's Coronet is part of the transmog set Moonpriest's Vestments (Priest, Mage and Warlock only), which the Appearances collection lists in 2 versions. The other 11 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Moonpriest's Coronet Fits
Other Items Named Moonpriest's Coronet
1 other item in the current build is also called Moonpriest's Coronet. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 165435 (165425 to 165440) were usually added in the same batch as Moonpriest's Coronet: the same quest line, zone, vendor or reward set.