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Dry card compass
Brass, heavily tarnished. Front and back sights.
Card: Mica covered with blue/green paper with black markings graduated to 4 cardinal points and 360 deg. Brass jewelled pivot cap at centre.
Needle: Unsighted
Pivot: Unsighted
Sights: Back. Hinged prismatic slit and eye hole. Front. Openarch with wire, hinged black reflector plate attached. Stop button attached to hinge.
O.A. Height 3.0" (7.8 cm)
Card: Mica covered with blue/green paper with black markings graduated to 4 cardinal points and 360 deg. Brass jewelled pivot cap at centre.
Needle: Unsighted
Pivot: Unsighted
Sights: Back. Hinged prismatic slit and eye hole. Front. Openarch with wire, hinged black reflector plate attached. Stop button attached to hinge.
O.A. Height 3.0" (7.8 cm)
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Object Details
| ID: | ACO0111 |
|---|---|
| Type: | Dry card compass |
| Display location: | Not on display |
| Creator: | Schmalcalder, Charles Augustus |
| Date made: | circa 1812 |
| Credit: | National Maritime Museum, Greenwich, London, Admiralty Compass Observatory |
| Measurements: | Overall: 40 mm x 75 mm x 70 mm |