Brookhurst Igranic Relays Manual Brookhurst Igranic Relays and Contactors, Starters and Switches Types 303, 472, 620, 728, 727, 728, 759, 779, 8013B, 8016B. Maintenance and Spares Sheets with useful assembly diagrams. Manufacturers: Brookhurst Igranic Models: 303 472 620 727 728 728 759 779 8013B 8016B Contents: Operators Manual