ETA 7750 Service Walkthrough     The 7750 was first available in 1974, having been one of the first movements to be designed with the aid of a computer.  It's hard to believe that the 7750 is still the industry standard movement for chronographs considering it's history.   It was developed over 40 years ago by Valjoux, who was then a legendary movement maker that was part of the giant ASUAG conglomerate.  But by the end of 1975 production was stopped due to the onslaught of the Quartz Era,