3" Pocket Box Sextant in a wooden box
Regular price £50
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Also called a box sextant and a very compact instrument. Edward Troughton invented this unique instrument in the early 17th century. It opens up with the cover that becomes a base and grip for taking readings. To take the image a little scope pulls out from the side. A filter also swings out when not needed and folds back inside before closing. The readings are read off the scale with the tiny adjustable magnifying glass on the top. It is 8 cm in diameter and 4 cm deep with the cover under the top. This unique and unusual instrument comes with a wooden box.