on Feb 2, 2017
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This sextant is a bargain in part because it is made of lightweight aluminum rather than solid brass
The Astra IIIB is made by the Changzhou Celestaire Instrument Co
The frame is made from lightweight aluminum alloy which resists corrosion
It has long been used by many manufacturers for lightweight versions of their heavier brass or bronze sextants in order to reduce arm fatigue and unsteadiness among infrequent users
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