"Manufactured by James Rigg & Sons, Crawick Forge, Sanquhar, Dumfriesshire, Scotland.
Established 1772
Contractors to His Majesty's Government."
Illustrated catalogue of goods available from James Rigg & Sons.
Rigg's range of goods were 'widely known to Agriculturalists, Road Surveyors, Contractors, Engineers, Coal Masters, Mill Furnishers, Stevedores, Railways, Ironworks, and Corporations'
(British and Colonial Review)