Giltzow Guitars
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Front dial and 7 days of the week with selection knob

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Back dial. Displays sun and moon in the zodiac, phase of the moon and age of moon in days

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Location latitude is selected and gnomon is turned to appropriate month to use sundial

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The days of the week knob is turned daily to operate the gear train that rotates the back displays

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Sun in the zodiac display

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Moon in the zodiac display

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This pointer on the hanger mechanism, sets the latitude of your location

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Astrolabe

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