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Sun Hand: Makes
one turn 24 hours
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Moon Hand:
Makes one turn every 24 hours and 49 minutes
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The difference
between Sun Hand and Moon Hand corresponds to the time the Moon takes to
circle around the Earth once: 27 days, 7 hours, 43 minutes and 11.5 seconds
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The Dragon
Hand moves almost at the same speed as the Ecliptic, but it makes one
extra turn every 18.611 years. It indicates solar or lunar eclipses, if it is
aligned simultaneously with the sun and moon hands.
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Ecliptic
represents the firmament and is divided into the 12 signs of Zodiac. It makes
one turn every 23 hours, 56 minutes and 4.1 seconds (exact time that the
earth needs for one rotation around its own axis)
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The
Planisphere or Watch-Dial represents the earth in a planispheric (flat)
form. The horizon line separates the visible part of the sky (silver-coloured
upper part) from the invisible part of the firmament, hidden behind the
earth. The Planisphere is calculated according to the latitude of the
specific place. This example is 46 degrees North (Geneva and Chicago etc.)
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The Equator
represents the calendar with monthly graduations. It makes one turn every 365
days, 5 hours, 48 minutes and 46 seconds (exact time that the earth needs for
one rotation around the Sun). This takes into considerations all leap years
of the Gregorian calendar and has never to be adjusted.
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The Bezel
has a 12-hour graduation (Roman numerals) for the legal or normal time and a
24-hour graduation (Arabic numerals) for the solar or local time and all
astronomical data. For better clarity, the 24-hour graduation has been
omitted at the location of the Roman numerals.
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