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Ship's hourglasses were calibrated to the half hours of the ship's watch, and if the helmsman didn't turn the glass too early it actually doubled in defining longitude. The helmsman would keep a thirty minute hourglass at hand, to keep track of the eight half hours of each watch. One half-hour on board ship's was actually called a "Glass". On board the helmsman would sound the Ship's bell a consecutive number of times for each half hour passed of the current watch. Designed for the “Age of Sail” and now at home in any den or executive office. This is a exact replica of an 18th century French maritime hour-glass issued by the French Admiralty Board for use on an Admiral’s vessel. Included is a wall hanger which allows the display of it’s interesting gimbaled construction. Hanging from its own wallhook, it can be flipped over to restart it. Desk-bound, it makes a handsome accessory. · Solid brass housing · Hanger & hook for suspension from a wall · 30 minute sand timer Dimensions: Length: 7.25 in. (18.5 cm) Width: 5 in. (13 cm) Height: 6.5 in. (16.5 cm) | |||||||
