The headset on my Trek 616 is a mishmash of (iirc) a Campy crown race, no-name bearings, a DA 7400 lower cup, a Tange upper cup, an upper cone from I think a Pugeuot and a Stronglight locknut. Because that's what I could find in a hurry to fit the Motobecane Grand Touring fork I replaced the bent original jobber with. Somehow I got everything to fit with reasonable tolerances.

It's been my most reliable headset. Adjusted it once, almost two years ago, now, and haven't touched it since. Works a treat.