I think that this may have ben quite common. It's on the Simplex Grand Tou risme derailleur on my Newton. If you want some, see item no. 360044509043 on eBay.
Neil Foddering Weymouth, Dorset, England
> Date: Mon, 23 Jun 2008 06:26:58 +0200
> From: email@example.com
> To: firstname.lastname@example.org
> Subject: [CR]Thin & Bare Gear Cable Housing - French
> The cable housing on a 1950's french touring bike I have came with realy
> small diameter cable housing.
> The housing is bare, it has no plastic covering.
> Never seen that before, was it common?
> And if so, is replacement cable housing still available?
> Amir Avitzur
> Ramat-Gan, Israel