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1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6 in. Long
1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6 in. Long
1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6 in. Long
1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6 in. Long
1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6 in. Long

1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6 in. Long

$ 20.32

Availability: 82 in stock
  • Original/Reproduction: Antique Original
  • Primary Material: Brass, EBONY
  • Condition: Very Good 'used rule' condition
  • Country/Region of Origin: Unknown
  • Maker: unknown.

    Description

    Here we have an
    Antique
    1800's Ebony & Brass Folding Parallel Drafting Navigational Rule, 6" Long.
    There is no maker's mark on this rule.
    These early Ebony rules were used extensively in charting or course plotting on paper maps by ship's navigators in the 1700-1800's.  They were also used by draftsmen and Architects of the day.  This rule was designed to allow the user to transfer a parallel line to another place on the diagram or map.  This is identified as an early instrument by the ornate Georgian concentric circle decorations on the brass folding hinges.   There are NO cracks or chips.  There are no owner marks.
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