At the time Superbe came out, Shimano had been doing quite well selling unified groups, and the loose consortium of manufacturers competing with them (Dia Compe/SR/Suntour/Sashin/MKS) felt the need for a cohesive road group, hence the unified groups under the Suntour Superbe and Cyclone names. Manufacture of the parts were left to individual manufacturers, even though they were all badged as Suntours. The hubs were Sanshin, cranks Sakae Ringyo, etc. Such is my understanding, anyhoo. Every sunshine I've had is loose ball. I'm not even certain they are still about, frankly, so I cant pretend much expertise...

While we're on the subject of vintage Japanese hubs, the early Shimano Dura-Ace hubs are really, really nice as well. I'm pretty certain if you blindfolded me and had me spin Dura-Ace, Sunshine pro-ams, Normandy Luxe Comps, and Campy Record, I wouldn't have the slightest clue which was which. The Sunshines and the Dura-Aces were both available in a really cool black, though. Style points are henceforth awarded.