"Sachs New Success (early 90's): same as old Campy. Contrary to a bunch of misinformation on the web, these derailleurs and shifters are functionally equivalent to old Campagnolo"

Thanks for the numbers data, I had not seen that before!

As far as the New Success derailer, I remember having a contemporary-looking, good-quality version of of one of their derailers in the early 1990's which was absolutely spot-on in an otherwise entirely Shimano 7-speed system.

Perhaps mine was one of the MTB versions for compact drivetrains, as it did have a short cage iir, but the faceplate markings were just painted on and had all rubbed off.

There were also Sachs Ergo equipped road bikes, which used the Shimano SIS cable actuation ratio but which indexed over the slightly-different Campagnolo freewheel.