FiveAlpha
Retro Guru
Shimano 600 History | Livestrong.com
Shimano first introduced Dura-Ace 600 group sets in the 1983 as an alternative to more expensive recreational bicycle accessories. Components included derailleurs, side pull brakes and gear sets. Affordable pricing resulted in a degree of popularity that eventually attracted competition cycling...
www.livestrong.com
Almost every single thing stated, is wrong.
My favourite part:
"As a result, Shimano expanded the Dura-Ace 600 line to include dual shift levers, multi-speed gear sets and bottom bracket hubs."
Reminds me - I need to service my bottom bracket hubs this weekend.