old brass reduction compass proportional scale divider geometry tool used designs |
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navigate by keyword : measure map exploration precision instrument latitude sail travel sea device ancient adventure closeup wood solve convert pattern drawing artist engineer speed time distance navigation chart designer square solid plane circle line divide downscale upscale down draftmen tool geometry antique old brass proportional divider scale compass reduction |
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Brass reduction compass or proportional scale divider. Geometry tool used to scale up or down designs and in navigation to transfer distance on charts |
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