This item creates the following item level 496 trinkets:
Notes: Timeless Curio is unaffected by Burden of Eternity. It is also possible that a hybrid class can receive a trinket for a different role - ie. balance druid given Heal version instead of DPS Int. Finally, all the trinkets are Unique-Equip so be careful to change your loot spec on your hybrid character before using a second Timeless Curio.
Or by changing your class loot specialization in the player options menu. (Right-click player unit frame -> Loot Specialization)