Originally Posted by Slightspeed

Thanks guys. I tried rewinding the spring, like you said. It feels and looks right, but I haven't re-installed it yet. I like the looks of the Simplex, and would like to keep it if I can make it work. I'll save the VGT Luxe for another day. Thanks for the response! And encouragement.

Does anybody know the exact model of this derailleur? All it says is "S.G.D.G" on the back plastic surface. No markings for model no. anywhere else. It's on my '78 PR10.