Rolling parallel rule by Elliott Bros
1870-1910
Rolling parallel rule by Cooke
1922-1950
Parallel rule
1876
Parallel rule, wood, single parallelogram type
Ivory parallel rule, six inch
Rolling parallel rule by Dollond with enamel dial
Parallel rule
1876
Parallel rule
1876
Parallel rule in bakelite signed `Lund's Rule
1922-1927
Sliding parallel rule:- 3 foot
Thirteen-arm parallel rule
1840-1860
Mechanical parallel rule, brass, in pine case
Rolling rule for typewriter spacing
Parallel rule
1731-1770
Parallel rule, 18 inch, metal, rolling type
1876
Parallel rule, 18 inch, wood, rolling type
1876
Boswell's parallel rule
1805-1830
Field's parallel rule
1876
Parallel rule, 6-inch, ivory, rolling type
1876
Parallel rule
1876
Parallel rule
1876
Naval parallel rule
1882-1887
T square with elaborate adjustments
Parallel Rule
Rolling rule with 30cm scale and protractor made by Shinomo
1980-1990
Rolling parallel rule by Stanley in brass
1900-1930