yup, those are rikkens alright. I have the black 16's on my '72. I'm not sure if it's riken or rikken though. If they are no longer avail, the seller may know that and factor that into his price. It seems that alot of folks are looking for that rim these days.
I've got a '72 240z that I'm building up for autocross and maybe IT or something more serious like E production one day. Anyway, I'd like some advice on where to find some weld-in camber plates. And why not caster/camber plates too. Thanks! clay