It's hard for me to say, as I don't know the condition of the watch, mainspring, pivots, holes, etc. There's a lot of variables, I suggest looking at how the pallet pins lock with the escape wheel teeth. How did you grease this? On the pins or on the escape wheel 'root' of the tooth? Is it locking evenly on both pins and deep enough, as the 'draw' is vitally important on these and they 'lock' much deeper. Check your hairspring is dead flat to the balance and it isn't magnetised and how does the hairspring 'breathe' between the curb pin and boot on the underside of the balance cock? Did you clean and re-grease the mainspring and arbor and peg out all the holes and clean all the pivots and pinions. Did you lubricate the top cap jewel and bottom polished metal cap? Did you completely take the top jewel out of the setting and clean to a mirror finish before replacing, screwing into place and oiling through the oil sink and push the oil through with an adapted oiler that has been honed down. You can see why many don't like working on these, as they are easily worn to the point of being thrown away, because if the low quality of parts on a cheap 'pillar' construction watch