Ivory parallel rule, six inch
Rolling parallel rule by Cooke
1922-1950
Parallel rule in bakelite signed `Lund's Rule
1922-1927
Rolling parallel rule by Elliott Bros
1870-1910
Rolling parallel rule by Dollond with enamel dial
Parallel rule
1876
Parallel rule
1876
Parallel rule
1876
Sliding parallel rule:- 3 foot
Rolling rule for typewriter spacing
Parallel rule
1731-1770
Thirteen-arm parallel rule
1840-1860
Mechanical parallel rule, brass, in pine case
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
Rolling rule with 30cm scale and protractor made by Shinomo
1980-1990
Rolling parallel rule by Stanley in brass
1900-1930