The Sundial goes back to 500 BC and farther. In the ancient world there were sand clocks, water clocks, candle clocks etc. The first mechanical clock was built around 1300 AD. The first wrist watch was made in 1868. Sundials are very accurate if you set them up right. They are a great survival skill to know too. If you make your own.
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Antique Sundial, How it Works! Gary J
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