I attended the finish of The Sun Tour here in Australia towards the end of 1977.I remember seeing Black Dura-Ace components there for the first time.I remember being particularly taken by the high flange hubs.At that time the Sun Tour was a domestic race and therefor unlikely that any riders had come from overseas to race.If those components were on bikes here at the end of 77 i'm guessing it may have made its way to the rest of the world a little earlier Geoff Duke in Melbourne Australia