Chas., John
It is a SLJ 503 triple derailleur. It has a rear control arm. Like the one at upper left in this photo:
http://photos1.blogger.com/
If I could find a solution without using cable housing, then great. I know one way would be to drill a hole in the bottom bracket shell, 0,5 mm metric, and attach a cable guide. I just thought that, originally, these derailleur had matching cable stops. If so, I would have prefer to have find one. But if I can not find a stop, I will attach a cable guide.
Mike Anderson
Gothenburg, Sweden