NOS 1973 Shimano Dura Ace Centerpull Brakeset: 65/47mm - Straddle Cables - Carriers - Front Cable Stop - 1st DA Part Ever! (PRISTINE)

These brakes are the very first Dura Ace component!  They were produced only in 1973, as an upgrade to the Tourney Centerpulls.  The DA had a stronger alloy for the arms, and the inclusion of bushings in the pivots.  There is some...