Dura-Ace is the admiral ship of Shimano, the Japanese (now multinational) manufacturer of cycling components (and some other things like fishing tackle and rowing equipment). Here is a brief history of Dura-ace.
“Handmade by machines” is the slogan of BMC impec. BMC defining their goal as “zero error”. And the result is a really an impressive machine. You can see and feel the perfect quality on every details.
2013 Dura-Ace, Shimano’s high-end road groupset will be 11 speed. The new version of the groupset is also lighter and stiffer.