Úvod »Letectví, kosmonautika» Norton 500/600/650/750 Twins (57-70)
Modely: 88/497 ccm (57-63), 88SS/497 ccm (61-66), 99/597 ccm (57-66), 99SS/597 ccm (62-66), 77(*)/597 ccm (57-59), Sports Special/647 ccm (62-68), Manxman/647 ccm (62-68), Mercury/647 ccm (68-70), Atlas/745 ccm (63-68), N15(*)/754 ccm (1967), G15(Matchless)/745 ccm (64-67), P11/745 ccm (66-67), Ranger(P11A)/745 ccm (67-68). Modely označené (*) nezahrnují popis verzí Featherbed.