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