Sheldon Brown wrote:
> I think Schwinn invented the _slotted_ variant that allows for easy
> lubrication of the cable without requiring disturbing the cable
> anchor bolt.
I saw Fausto Coppi's early '50s Bianchi with Campagnolo Gran Sport that had a slotted cable housing stop for the rear derailleur that predates Schwinn.
Chuck Schmidt South Pasadena, Southern California