Originally Posted by
Jeff Wills
The screw in the upper body of the derailleur is the high-gear limit screw. Adjust the upper and lower limit screws, attach the cable, then use the "select screw" to fine tune the adjustments on the cogs.
I think. It's been nearly 40 years since I worked on one of those.
There is no high or low limit screw. The only 2 screws are in the photo.