Yes: Is it an item? Can it be equipped? There can be only one? Is it from an xpac Is it some form of armor? In the standard UI inventory window is it equipped on the left side? Can my wizard use it? Can my friends mage use it? Can our other friend who's a paly use it? Is it a “chest” slot item, like robe, BP, etc? Is it a quest reward? Was it around when I retired in 2006? No: Is it round? Is it a weapon? Did that xpac have a bump in max level for standard experience gain? Is it a hat? Is it pants? Platinum efreeti chestplate For some races. Does it appear as a robe? Is it player made? Does the quest start on one of the three old world continents? It's supposed to cover your chest but how it does it will depend on your race: Does it cover your chest (like a bra)?
Editing because I see you already gave an answer that eliminated my idea. Does the quest originate in the Prophecy of Ro expansion?
I think I've been phrasing the question incorrectly. Was the quest created in an expansion that existed prior to "The Gates of Discord"?
At the time of release, did the zone the quest starts in require prior work in the specified xpac to access?