Rectangular protractor and plotting scale
1825-1830
Hutchinson's stereographic protractor
Equarrimetre, form of rectangular protractor with sliding cursor
1918-1922
Protractor scale
1876
Rectangular protractor and plain scale
1800-1819
Rectangular protractor for nautical use
1906
Rectangular protractor
Protractor scale
1876
Kelsey Draughtsman's Universal Square and protractor
Protractor with plummet clinometer
1876
Trigonometer serving as protractor and parallel rule
1902-1920
Patent protractor in form of set square
1885-1895
Ivory protractor by Ross, London
1830-1859
Protractor scale
1876
Combined protractor and set square
Protractor scale
1876
Brass scale and protractor by M.Berge
1800-1819
Parallel rule and protractor
Protractor scale
1876
Protractor scale, on ivory, 5"x1 9/16"
1876
Protractor ivory, on ivory, 5"x1 9/16"
1876
Combined navigational protractor and parallel rule, 1944-1970
1944-1970
Protracting parallel rule and components
1800-1860
Rolling rule with 30cm scale and protractor made by Shinomo
1980-1990