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Square signed "J.Ramsden, 1757"

1757

"Digby Murray's patent radial set square", c. 1880

1878-1882

Set squares

Set squares

Square with four scales of equal parts and ornate ends

Square, folding type, engraved: 'Canivet a La Sphere a Paris'

Set squares

Three set squares, paper on wood, by T. Sopwith, for use in isometric projection

Three set squares

Folding square in brass signed Pigeon A Lyon, c. 1770

Folding square in brass signed Pigeon A Lyon

1772
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
Two wooden set squares (B520; A 38448)

Two wooden set squares

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
Bing's "Circular Square", steel. In case. Two wooden "circular squares" mounted on a board

Bing's "Circular Square"

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