Mathematical Drawing Curves
Drawing curves by Smith & Coventry, Manchester.
Drawing instruments engineering drawings, articles and in house magazine from Smith & Coventry Ltd 1900-1929
Drawing curves by Smith & Coventry, Manchester.
Three-sided rule, made by Darling, Brown & Sharpe.
Folding 20-inch rule, made by J Rabone & Sons.
A pair of unsigned 9.5-inch rules in a case, made by Smith & Coventry Ltd.