Details
A SILVER PERPETUAL CALENDER
no apparent marks, The Netherlands, circa 1715

Circular, one side with six apertures and engraved with a laurel band to the outer rim and with flower heads, the other side engraved with a similar band and dated Anno 1715 and with one elongated aperture - 5.5cm diam (24gr)

Lot Essay

The six apertures on one side of this calender show;
the signs of the Zodiac
amount of days in the month
time of sunrise
time of sunset
hours of daylight
hours of darkness
The other side shows the dates of the month

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