The Old Number One is a quest given by Scrooge McDuck when Mickey enters his room for the first time.

Scrooge's Number One Dime is located in London Skies.

When Mickey gets the dime, he must return it to Scrooge to complete the quest. Once Scrooge receives his beloved Dime, Scrooge will be grateful and reward Mickey with a Health Upgrade and Room Star.

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