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- Hourglass Nuremberg C.1700
- Hourglass dated 1763
- Antique brass hourglass c.1700 (Sold)
- Nautical hourglass 18th century
- Nautical hour-glass XVIII
- Travel hourglass 18th Century
An early device for measuring time.
It made of two glass chambers linked by wax cord.
Some models are with tree or four double chambers for measuring the quarters of an hour.
Antique hour-glass are made in wood, ivory or metal.