Despite being the spitting image of the 1973 Shimano Crane, the 1985 Sachs-Huret New Success was a huge step forward from its Huret antecedants. Crucially, for Sachs-Huret’s new flagship derailleur, it was all aluminium, only the rear parallelogram plate was a pressing the other parts were castings, it had a dropped parallelogram (although without any slant) and, finally, real care and attention had been paid to finish, with silky anodising and well chromed small parts.
It was a demonstration by Sachs that they were no longer interested in the ‘French tradition’ of (mostly odd) derailleur design, and were determined to compete with the best in the world - the Japanese.
This example is the long pulley cage ‘touring’ version. It is a monster. Not content with a massively long pulley cage, it also has longer parallelogram plates (47mm) than the ‘racing’ version (which has 40mm plates).
A good effort - but it is hard to catch up a couple of decades in a single bound.