Rear chain 110056, 530, (5/8 inch x 3/8 inch, 0.625 in x 0.380 in) 99 pitch Renolds A&S with joiner110056 or119059 Grand Prix97P = 650 SS: 1965-68; N15CS: 1964; Atlas 750 Mk1 and Mk2: 1965-6898P = Commando 745: 1968; Commando S 745 19T: 1969-72; Commando Mk1 750 and Mk1 850 19T gearbox: 1973;99P = Commando S 745 21T: 1969-72; Commando Mk1 850 from engine 22000 forward 21T gearbox: 1973-74; Commando Mk1A and Mk2A 850 21T gearbox: 1974; Commando Mk3 850 20T gearbox: 1975100P = P11A Ranger 745: 1968; Commando Mk1A and Mk2A 850 22T gearbox: 1974; Commando Mk3 22T gearbox: 1975AR10B1