Cross-head, 1795-1805

Open cross-staff head with four fixed alidade sights

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Open cross-staff head with four fixed alidade sights
Science Museum Group
© The Board of Trustees of the Science Museum

Open cross-staff head with four fixed alidade sights, by Dollond family, London, England, 1795-1805

Details

Category:
Surveying
Object Number:
1921-81
Materials:
cat gut and brass (copper, zinc alloy)
Measurements:
overall: 142 mm x 162 mm x 153 mm, .695kg
type:
cross-head
credit:
J.C. Stevens (Auction Sales)