Brass set square, 60 and 30 degree angles, with protracting and 1/4 inch scales, made by Holtzapffel & Co., London, B4364, A50981 Brass set square 1839-1865
Marquois scales, military pattern (a set square and two straight edges) by W.F. Stanley, London, 1876. Marquois scales 1876
Set square, metal, by Thomas Jones, 60 degrees, in metal 3/16" thick, bevelled at base and hypotenuse, at bottom of perpendicular is a brass scale 1" long divided into tenths, J.D. Potter's card inside triangular wood case Set square 1806-1861
Two brass set squares, one an equilateral triangle with two edges divided as 90 degree protractors, the other a 30 and 120 degree isosceles triangle with 1/4 inch edge scales, B4365, A50974 Two brass set squares
Six large set squares for use with animation rostrum set up. Six large Set Squares for use with Animation Rostrum set up.