Originally Posted by
cyclotoine
I think MKII states MKII on the body. The capacity should be about 28teeth unless it is a long cage, but then it would say cyclone GT on it.
If it's first gen. (not MKII) and not a GT, its capacity will be less than that - officially, those Cyclones were rated for 13-24. They were intended as racing derailleurs. The capacity for the first gen. Superbe introduced in 1977 is even less.