OhDark30 found my post on F71, and recommended that I share here too.
Recently I inherited a Buliva M5 from my wife's grandfather. It was not working. After examining the exterior to the best of my ability, curiosity got the better of me, and I popped the back off of the case so I could look at the movement.
I am not the most knowledgeable when it comes to mechanical movements, but I do know generally what does what from examining whats around it. It turns out that the balance wheel was stuck. After gently massaging/playing/working it back and forth I got it moving again. I did this last night whilst at work. It is again working.
This morning, I put it up next to my HMT Pilot to see if it would gain or lose much time. As of 23:00 (GMT -5) it is +6 seconds. Still I will only wear that one on special occasions.
Btw I have been reading the forums for months, so I'm kinda new.