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It is a simplified planispherical astrolabe whose final shape came as a result of the experience of navigators. By measuring the altitude of the stars you obtain the Latitude.
This Portuguese marine astrolabe (1550-55) was owned by a Dundee skipper, A. Smyton. The original is at the Art Gallery and Museum of Dundee, Scotland.
Non functional item. Available on brass or silver plated, please remember to advise when placing your order.
Diameter: 25mm / Thickness: 1.8mm
Diameter: 0.98" / Thickness: 0.07"
How to buy pins:
Please check Astrolabe´s Pins Pack