Since Disraeli Gears state that the Sante group was dismissed for dilettante poseurs, their write-up seems to have a particular disdain for Dura Ace and they show none of the 7400 series which were the seminal derailleurs of Shimano index shifting (cable pull not-withstanding). I know Dura Ace 7 speed came out in the spring of 1987, because I decided to buy the 7400 (6 speed) deraileur and I was friction shifting. Sante probably came out at the same time. It was an excellent group, but pretty ugly as it yellowed and got dirty with age.

John