Plastic yachtman's sextant

Made:
1970-1975 in Wargrave
maker:
Henley Plastics Ltd.
Patent ?Boat? sextant (No

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Patent ?Boat? sextant (No
Science Museum Group
© The Board of Trustees of the Science Museum

Patent ‘Boat’ sextant (No.42450), grey plastic plate and index arm with stiffening (without case), by EBBCO, Wargrave, Berkshire, England 1970-1975. Consists of plastic 120° scale (-20° to 120°) with 10’ division and aluminium micrometer (10" scale), three index-filter shades (red & green), two horizon filters (blue & green). Fitted with sighting telescope (erect image – 73mm).

Details

Category:
Navigation
Object Number:
1994-221
Materials:
plastic (unidentified), aluminium (metal), paint, metal (unknown) and glass
Measurements:
overall: 235 mm x 230 mm x 75 mm, .345kg
type:
sextant
credit:
Force 4 Chandlery