'Just after 1500 Peter Henlein built the first spring-driven one of these that fit in a pocket'
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SCIENCE & TECHNOLOGY: Just after 1500 Peter Henlein built the first spring-driven one of these that fit in a pocket
Just after 1500 Peter Henlein built the first spring-driven one of these that fit in a pocket
Just after 1500 Peter Henlein built the first spring-driven one of these that fit in a pocket
SCIENCE & TECHNOLOGY
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SCIENCE & TECHNOLOGY