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Date: |
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Description: | 490 B
Schmalcalder's // PATENT // No. 82 Strand // LONDON
Surveying compass
Bowl: Dia. 2.9" (7.4 cm) Brass, glazed. Inside of bowl painted black. Fitted with card locking mechanism operated by knob at side of case, and a card break operated by a stud at side of bowl. Brass lid.
Sights: Fitted with a 90 deg. prism, two dark shades and a slit sight on one side, and a rectangular frame 2.25" (5.7 cm) long (with thread) and dark ground glass screen on the opposite side.
Card: Dia. 2.4" (6.1 cm) Mica covered with green paper with black markings. Graduated to 360 degrees from the South point. Brass jewelled pivot cap at centre.
Needle: Unsighted.
Pivot: Unsighted.
O.A. height 1.0" (2.6 cm)
Inscription.
caption: unavailable | Publisher: | "http://collections.rmg.co.uk/" | Rights holder: | "Royal Museums Greenwich" | Subjects: | surveying compasses | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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