Antique sand clock

Listing ID #3509855

The structure of a hourglass comprises two glass bulbs interlinked with a narrow neck in a vertical position; and held by a wooden or metallic frame. The sand from upper glass bulb pours to the lower one slowly. The sand can be powdered marble, powdered silica, or round & polished sand. Through sand quantity, the exact time can be measured. It works on similar principle as Clepsydra-water clock, in which water moves between two vessels. Our company provides antique sand timer maritime wooden, royal navy antique sand timer and antique nautical maritime wooden hourglass sand time