NORTON 500cc 88 and 600cc 99. 1956 De Luxe TWIN Cylinder models. However, the original lists all the parts employed but not all are pictured. Having said all that all relevant part numbers are readable.
NORTON JUBILEE 77 88 99 MANXMAN G15 COMMANDO 1948 - 1977 PRODUCTION HISTORY BOOK
NORTON AMC GEARBOX NEW KICKSTART RETURN SPRING 00-0043 1954-1962 88 ,99, 650ss
2 X Norton Supplementary Spare Parts List 1954 And 1960 Models 7,88,99 Es2 & 50
NORTON MODEL ES2, MOD50 88, 99 ATLAS MAINTENANCE MANUAL P106/P+ NOW01 1957-67
NORTON 250 JUBILEE 350 NAVIGATOR ES2 50 88 99 MANX ORIG. 1961 UK SALES BROCHURE
Norton Dominator Model 88 and 7 De Luxe Original Motorcycle Parts Book 1955