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Ships within 48 hours · Estimated delivery Aug 27 - Sep 1
Dimensions: 8
Weight: 4 lbs
Featuring a wooden lunar volvelle and equatorial sun and moon dial
This highly sensitive instrument was often used in photometry and hygroscopy
and early example
Early 'Heliochron' Pantochronometer trial frame Dimensions: 8A Rare early 19th century Pantochronometer hand engraved 'HELIOCHRON' on lid. Complete original. Dome cased brass sundial compass with floating paper face and fixed brass gnomon. Pantochronometers were first developed in the late 1700's, and widely popularized in 1820 by Samuel Porter. A fine, functional, scarce, and early example. Circa 1830. Diameter: 4. 5 cm. Height: 3 cm. Weight: 1. 7 oz.
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