Sundials - World's Oldest Clocks

North American Sundial Society

Selected Sundials of Guam

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De Dedo Guam USA Analemmatic Dial 480
This analemmatic dial approximately 10 x 20 feet set into concrete. At the low latitude of Guam, the gnomon standing spot extends outside to ellipse of hour markers. Between April and September the shadows are very short near the noon hour and are difficult to read.