Arnora's True Amulet is a clothing item in The Elder Scrolls IV: Oblivion. It's a red amulet found in Arnora's Chest in her house. It bears a striking resemblance to the legendary Amulet of Kings.
Related quest
Two Sides of the Coin
During this quest, Arnora's True Amulet is used as part of a ruse along with Arnora's Amulet to fool her husband, Jorundr, to think that the Hero has killed her in Bruma.