@russmeyer It's a Hi-Lo hub. Not totally unique, the Campag ones are rare and valuable. I have a Phil 6 speed one. It's meant to improve the triangulation and reduce tension difference on dished wheels. Seems pretty pointless on a track hub, as the shells are easily made symmetrical. But that one^ is damn sexy looking.
@russmeyer It's a Hi-Lo hub. Not totally unique, the Campag ones are rare and valuable. I have a Phil 6 speed one. It's meant to improve the triangulation and reduce tension difference on dished wheels. Seems pretty pointless on a track hub, as the shells are easily made symmetrical. But that one^ is damn sexy looking.