Description
Torsion clocks are usually delicate, ornamental, spring-wound mantel clocks. The polished clock mechanism is exposed under a glass case or dome, to allow people to watch the torsion pendulum turn. Clocks of this style, first made by Anton Harder around 1880, are also known as 400-day or anniversary clocks, because many of them only have to be wound once a year or longer (some have been made that will go for up to 1000 days on a single winding).
Read more about this topic: Torsion Pendulum Clock
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