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Lot 0017
The white porcelain dial has sub chapters for hours and minutes, a sweep second hand, shows the eastern hemisphere and is signed 'Louis Barbette a Venise'. The multi-layered eight-day movement has an unusual detent escapement, a rare compensating balance wheel, friction rollers and direct drive to the hands. It's housed in a custom made gimbaled mahogany box with Key.
The brass case and movement were displayed at the Franklin Institute in the early 20th century.
For a complete discussion on the movement see the 1951 NAWCC article by T Irvin Eldridge III.
There is another example of Barbette's work in the Royal Swedish Academy of Sciences.
It ticks when wound.
Height - 9 in.
Width - 9 in.
Dial Diameter - 3.5 in.

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Exceptionally Rare Late 18th century Chronometer

Estimate $15,000 - $20,000Jun 04
Greenlawn, NY, USA