Guessing here late 70s early 80s.Someones gone to some trouble with these looks like a gold powdercoat finish in good condition.Front hub has brake backing plate with linings and springs looks good,no activating arm.Backing plate magnesium.Back is hub only with bearings.Comes with 4 Talon sprockets of varying sizes,machined to fit,look they theyve hardly been used.They arent doing any good sitting on my shelf so if you're interested send me your email and I'll send some photos.$150 plus post.