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Funktional principle
Time
Date
Sub-solar point
True noon
Unique


Precise Middle European time

Accurate to the second, the luminous
point crosses the time lines. For every
single minute of the day, these lines are
marked on the screen. The movement of
the earth on its elliptical path around the
sun and its own axis is the gigantic
cosmic clockwork which powers the
sundial - accurately and consistently.
During a period of 100 years, it functions
within a margin of error of ± 30 seconds,
making it superior in accuracy to any
quartz clock.

Helios
Astronomical timepieces