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Title: Ring and Bead sight, the first effective sight used in the 1 [Go to resource]
Description: Ring and Bead sight, the first effective sight used in the 1914-18 war, and an Aldis collimated telescope sight mounted on common stand. Used in SE5 aircraft. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: telescope - sighting
telescope - refractingSource: Science Museum Identifier: 1993-2083 Go to resource More Like this...
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