Vintage, mahogany and ebony drafting drawing triangles/set squares. Larger one was made by A.G. Thornton Ltd, Manchester, smaller one has no makers mark. Larger one has the initials F. D. Day.
Both are in good vintage condition with age related marks. see photos.
Large one's
sides measure 35 x 30.5 x 17.5 cm approx.
Smaller one measures 25 x 17.5 x 17.5 cm approx.