Gilded bronze and silver equatorial sundial, made by Johan Martin, Augsburg, Germany, c. 1700 https://t.co/8y4STs8NxW

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White marble double spherical sundial w/ Greek inscriptions from Delos, c. 2ndC BCE; Archaeological Museum, Delos https://t.co/yUvXS0jRUM

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17thC-18thC portable Korean sundial w/ engraved indications; shadow indicates time & season when gnomon faces north https://t.co/xp9bN4zMxi

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Augsburg-type sundial by Johann Nepomuk Schrettegger, Augsburg, c.1797-1843 https://t.co/AopPv4Gqeq

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