[crazycarlitos]

Originally Posted by SearChart

The terminal curve (last bit of the hairspring before the stud) was stuck behind the rest of the hairspring, common issue after a drop. Next time just slap it a few times in your hand to dislodge it.

Broken balance staff would mean it would run with either dial up or down depending on where it broke, still completely unusable since it only 'runs' in that position, but a good sign to diagnose a broken staff.

Also, you can take a balance bridge with balance out of the movement even when fully wound, the pallet fork will prevent it from unwinding all at once. Now don't take the pallet fork out when fully wound (I've been there)...

Good to know