I also have a 1971 Bonneville 5 speed. My bike was assembled in June-July period according to the ser# and I was told any bike being built at this time of year if the assembly line ran out of parts they would just take parts from the new model year and use them. Ether way, it´s the gold and black theme and I´ve owned it since 1983 and love it. Feel free to email me anytime