The Hundred-Year Alarm Clock was a clock made by Smith & Tinker, designed to wake someone up after a century-long sleep, in The Wicked Witch of Oz by Rachel Cosgrove.


The Clock was made by Smith & Tinker, and at some point it came into the possession of Glinda the Good, who, after conquering Singra, set it to wake her up a century later. The clock did as it was instructed, and asked Singra too many questions, which annoyed her. The clock later said it would never have awakened her if it had known the trouble she would cause. When Ozma put Singra back to sleep, she set the clock for another hundred years. (The Wicked Witch of Oz)

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