dtimm

The Green slot is the top of the shock jewel assembly. I believe you tightened it down enough to contact the top of the balance wheel, but hopefully not enough to distort the end. Try backing (counter-clockwise) off the screw very slightly; approximately to where it started or ever so slightly further. It just may relieve the pressure on the balance wheel and allow it to rotate normally. Good luck to you!! Edit: It is also possible that the jewel is pressed in place and that you pushed it down on the top of the balance wheel. If that is the case, you may be able to have a watchmaker press it back out (this will require disassembly). It still sounds like all is not lost since the watch runs while it is upside down.

It was a parachute...which did not open.