Toni,
I would guess the bike is a renovation with cable braze-ons added but dropouts left as-is. Adding cable stops is easy compared to replacing a set of dropouts, and the frame would no-longer accept the P-R mech... perhaps the owner didn't want to completely abandon the old shifter system A bolt-on derailleur hanger would work fine for many applications, so no need to braze-on a hanger.
Cable stops were around in the 1950s, but the early Campagnolo derailleurs were marketed (and often used) with full-length cable housings. Reference again that picture of Koblet's bike from the 1951 TdF:
http://www.wooljersey.com/
Just my 2-cents worth.
Aldo Ross
Middletown, Ohio
> Ladies and Gentlemen of the Jury,
> I hope you don´t mind if I tap the collective CR list mind one more time.
>
> Yesterday I was sent a really strange frame. It is a Goldia, ca. 1950 I
> should say, very nicely made indeed, and it has toothed dropouts for
> Cambio Corsa or Paris-Roubaix. The number of teeth suggests the latter.
>
> The funny thing is that it also has a cable guide brazed onto the bottom
> bracket shell, a cable ring (not a stop) on the r/h chainstay and a stop
> on the downtube for a front derailleur. I´d have loved it to have a rear
> derailleur hanger on the Paris-Roubaix dropout, but no such
> luck.
>
> I can think of three possibilities, and would invite opinions.
>
> One, the framebuilder goofed. Least likely.
>
> Two, the original owner had the frame built at a time when the P/R gear
> was still available, and used for rough stuff, possibly during the winter,
> and Gran Sport on a bolt-on hanger during the summer. Nice thought, but
> far fetched. Anyway, were braze on b/b cable guides around
> in the early fifties?
>
> Three, the frame was renovated later in its life, but then it would have
> had the full works (chromed half-stays, beautiful lining, great paintwork)
> besides the brazed on additional bits, and when going to those lengths,
> why not swap the P/R dropouts for long usual ones? Perhaps the P/R
> dropouts were that long that other dropouts would not fit the stays? The
> mind boggles.
>
> Thanks for any input. Please do not send any pictures; I still use
> analogue POTS internet - else my Apple II would not be able to use it.
>
> Regards, Toni Theilmeier, Belm, Germany.