Rolling parallel rule by Dollond with enamel dial

Mathematics

Parallel rule in bakelite signed `Lund's Rule, Pat. Nov. 2.20'

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1922-1927

Parallel rule, 6-inch, ivory and electrum (double

Mathematics

1876

Parallel rule, 18 inch, ebony and brass ordinary p

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1876

Parallel rule, 18 inch, wood, rolling type

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1876

Rolling parallel rule by Cooke, Troughton and Simm

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1922-1950

Sliding parallel rule:- 3 foot, by William Cary, L

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Mechanical parallel rule, brass, in pine case

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Parallel rule, rectangular brass frame with steel

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1731-1770

Parallel rule, 6-inch, ivory, rolling type

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1876

Parallel rule, 6-inch, ivory and electrum, ordinar

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1876

Rolling rule for typewriter spacing, French patent

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Ivory parallel rule, six inch

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Parallel rule, 18 inch, metal, rolling type, edge

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1876

Ivory parallel rule, from set of drawing instruments

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1839-1900

Parallel rule, 18 inch, wood and ivory, scales on

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1876

Parallel rule, wood, single parallelogram type

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Thirteen-arm parallel rule, probably French, mid 1

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1840-1860

Field's parallel rule,18-inch boxwood and brass. "

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1876

Boswell's parallel rule, stamped "Banks, 441 Stran

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1805-1830

Parallel rule, 18 inch, metal, rolling type

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1876

Rolling parallel rule by Elliott Bros

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1870-1910

Rolling rule with 30cm scale and protractor made b

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1980-1990

Rolling parallel rule by Stanley in brass. `LCC WD

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1900-1930

Naval parallel rule, c. 1885, by John Bliss & Co.,

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1882-1887

Parallel Rule

Mathematics