Hi there, during the service of a ladies watch with an ETA 1201 I noticed that the banking pin on one side was bent outwards, so I straightened it. Then when assembled I was checking the movement before the balance went back in and the pallet did not unlock. So I realized then that it was bent for that reason. There is no room for adjustment of pallet stones, so I bent it back. Placed the balance back in and bingo, runs beautifully
Moto to the story is all is sometimes not as it seems.