Model Serial Identification 3 Abbreviations and Alphabetical Index 4 Chassis Parts Listing groups 0 000 to 9 999 inclusive I 5 Passenger Body Parts Listin g groups 10 000 to 15 999 inclusive 6 Commercial ... Body Parts Listing groups 16 000 to 17 999 inclusive 7 Supplementary Data 8 Numerical Index The Group System of listing parts has been retained and briefly is as follows Main units