Early 'Heliochron' Pantochronometer

A 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.