Optical square for use with telemeter, British, 1904-1911

Optical square for use with Steward-type telemeter, No

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Optical square for use with Steward-type telemeter, No
Science Museum Group
© The Board of Trustees of the Science Museum

Optical square for use with Steward-type telemeter, No. 67, in case, by J. H. Steward, 406 Strand, London, England, 1904-1911.

Details

Category:
Surveying
Object Number:
1986-575
Materials:
brass (copper, zinc alloy), glass, leather, velvet and steel (metal)
Measurements:
overall: .345kg
type:
optical square
credit:
Steward, D.M.