"Large Marine Hourglass Late 18th Century 30 Minutes"
Large late 18th century wooden maritime hourglass of 30 minutes with four columns. The glass bulbs are joined with wax and bound with gold thread. The operating time is 30 minutes. Good patina. The sand flows very well. Circular base. with its tying string, cut height: 24 CM Diameter: 12 CM 
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