Hemisferium Nautical GlassC012986
The Nautical hourglass or sand dial is a sea-going clock that usually lasted for a half-hour.
The hourglass that this replica is based upon, is probably from around the 16th century and can be found at the Naval Museum of Madrid. It is comprised of two glass bulbs connected by a narrow neck that allows a regulated flow of sand to travel from the upper bulb to the lower. The ampule lasts approximately 30 minutes.
Hourglasses were traditionally put to most use in the workshop, the pulpit and ocean-going ships where its most important role was in navigation.
The Hourglass measures 185mm in height and 100mm across.
Material: Beech and oak wood tainted with natural wax and polished, silk cord, crystal glass, silica dust and brass.