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Surveying compass
Bowl-Anodized brass, glazed. Inside of bowl black. Fitted with a card locking mechanism operated by slide at side of bowl, and a card brake operated by a stud at side of bowl.
Sights-Fitted with a folding slit sight on one side and a folding rectangular frame 3.25" high complete with thread and a 90 degree prism.
Card-Dia. 3.4" (8.6cm) Mica (?) covered with green paper and with black markings. Graduated to eight points and to 360 degrees. Jewelled pivot cap mounted at centre.
O.A.Height 1.5" (3.9cm)
Sights-Fitted with a folding slit sight on one side and a folding rectangular frame 3.25" high complete with thread and a 90 degree prism.
Card-Dia. 3.4" (8.6cm) Mica (?) covered with green paper and with black markings. Graduated to eight points and to 360 degrees. Jewelled pivot cap mounted at centre.
O.A.Height 1.5" (3.9cm)
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Object Details
| ID: | NAV0425 |
|---|---|
| Type: | Surveying compass |
| Display location: | Not on display |
| Creator: | Henry Barrow & Co |
| Date made: | circa 1850 |
| Credit: | National Maritime Museum, Greenwich, London |
| Measurements: | Overall: 20 mm; Diameter: 111 mm |