• Automotive Products Ltd (Filter Division), Bolton
• Bolton & Hayes Ltd, Reinforced Concrete Engineers, Bolton
• Bolton Gate Company
• Bolton Iron and Steel Company
• Booth, John & Sons, Constructional Engineers, Bolton
• Chadwick, James Ltd, School Hill Ironworks, Little Bolton
• Chatwood Safe Company Ltd, Bolton
• Dobson & Barlow, Engineers & Machine Makers, Bolton
• Greenhalgh’s Foundry, Atherton
• Hick Hargreaves & Company Ltd, Soho Works, Bolton
• Jackson & Brother, Wharf Foundry, Little Bolton
• Kay & Company, Brassfounders, Bolton
• Kirkham, J. & W., Lark Street Brassworks, Bolton
• Milner Engineering Ltd, Horwich
• Musgave, John & Sons, Globe Ironworks, Bolton
• Roberts, R. E. & Sons, Lead Pipe Manufacturers, Bolton
• Ryder Brothers, Beehive Foundry, Bolton
• Sharp & Hargreaves, Iron & Steel Manufacturers, Bolton
• Taylor, George, All Saints Street Brassworks, Bolton
• Threlfall, Richard & Company, Machine Makers, Bolton
• Wadsworth, William & Sons, Lift Manufacturers, Bolton
• Walmsley, Thomas & Sons, Atlas Forge, Bolton
• Wood, John & Edward, Victoria Foundry, Bolton