Iconic names The Carron Iron Works was set up in 1759 and became Europe's largest smelting works, with more than 1,000 staff. It was famed for its manufacture of red telephone boxes and pillar boxes. It also became associated with iconic names such as Henry Shrapnel, Alfred Nobel and James Watt, who had his first engine made at Carron. The plant, which was bought by Franke in 1990, currently employs 211 people.