A Moon phase watch is a miniature recreation of the different phases of the Moon displayed in an aperture on the dial. This is a vintage Jovial moonphase automatic watch from the 1960s.
Most of the moonphase watches
in the past comes with the triple calendars functions but this one has a Big
Moonphase window, date plus a window for measuring the tide. A “new moon”
occurs when the moon and sun are in alignment on the same side of the Earth and
thus there is no moon visible to us. As the moon travels through its monthly
orbit, more of its surface becomes illuminated by the sun — known poetically as
“waxing”. The second phase, known as the “first quarter”, is when the
right-hand side of the moon is in the sun’s light. Next comes the “full moon”
when the entire surface is lit up. Then it moves to the “last quarter” when the
left-hand side is visible — waning — until it finally goes back to a new moon
again.
This watch is found from Egypt.
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