Working Replica of an Early 20th Century Pilkington & Gibbs Helio-Chronometer

Name: Working Replica of an Early 20th Century Pilkington & Gibbs Helio-Chronometer
Brand: 3DMason
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In 1906, G. Gibbs applied for a patent for a novel sundial design—the Universal Equinoctial Mean Time Helio-chronometer.

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Working Replica of an Early 20th Century Pilkington & Gibbs Helio-Chronometer

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