Independent Ignition Supplies - Specialist magneto component suppliers Online Catalogue : North & Sons Ltd. Watford Magnetos : EO6 Contact Breaker Cover (642) Stock Number 642 - Original part number 143 - Reproduction. Price:  £35.80 (Excluding: VAT at 17.5%) Online Catalogue : North & Sons Ltd. Watford Magnetos : EO6 Independent Ignition Supplies - Specialist magneto component suppliers