Win a NASA Apollo 15 watch worth £300!

This month, every How It Works reader has a chance to win a NASA Apollo 15 American Moonphase watch by Xeric Watches. The lunar design celebrates NASA’s triumphant mission to the moon in 1971. Along with a pair of lunar hands and a luminous glow-in-the dark coating, this watch tracks the Moon’;s journey through its 29.5-day cycle. 

For a chance to win, answer the following question:


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