A dual purpose headset bolt which fits both Series 1 and Series 2 headsets. Series 1 uses the bolt, washer, and nut.Series 2 uses the bolt, spacer and washer. Made from high tensile steel and zinc plated.
The Complete Spanner's Manual: Lambretta Scooters by Martin 'Sticky' Round Third Edition 8100072
The Complete Spanner's Lambretta Kit Book 8100027T
Eibar Lambrettas 1954-1989 by Jaime de Prat Salomone
Lambretta and Vespa Street Racers BOOKAZINE by Stuart Owen