I've had a problem with my Steinhart Nav-B which has Valjoux 7750 movement. It's rotor had somehow broke loose from the movement itself. Message Mr.Lai through whatsapp and got immediate reply. Cut the story short, he repaired and serviced my watch with reasonable price and outstanding workmanship. He even absorbed the shipping cost to ship out the watch back to me since I'm not from around KL.
Highly recommend his service to anyone.