Semi-circular brass protractor by Heath and Wing
1751-1773
Brass protractor with two blades for setting out and measuring angles
1740-1749
"Digby Murray's patent radial set square", c. 1880
1878-1882
Semi-circular protractor 12-inch
1720-1753
Semicircular rolling protractor rule
Semi-circular protractor
Semicircular protractor
Brass scale and protractor by Pistor and Martins
1860-1900
Six inch protractor
Semi-circular protractor by Henry Sutton
1655
Tripartite semi-circular protractor
1791-1859
Semicircular protractor
Semicircular single-arm protractor by J.M. Kleman and Son
Semicircular brass protractor by William Wilton
Protractor, semi-circular
Plotting protractor, Struben's patent
Protractor, semi-circular
Protractor, silver 2 1/16 inches diameter
1740-1760
Protractor, glass
1853-1876
Protractor, semi-circular, by Jones
Semicircular protractor
1851-1887
Semicircular protractor
Plotting protractor (Struben's patent) made by Elliott Bros. engraved: "Elliott Bros
Semicircular single-arm protractor in case: by J.M. Kleman and Son
Semicircular protractor with sliding vernier and box
1865
Two protractors, brass (circular and semicircular) six inch
1876
Two single-arm protractors
1876