Metroid Dread - The Loop
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As of the September 19, 2011 update, new Perpetual Hourglasses can no longer be obtained because the Timeless Hourglass no longer functions.
Resale Price: Cannot be sold to NPCs.
How to Obtain
Perpetual Hourglasses can only be obtained by using existing, obsoleted Perpetual Hourglasses. They serve no function in modern FFXI.