I received a client's clock (Hermle 340-020A hairspring balance) that "gained time" right out of the box. After much frustration with the Furniture store where purchased, it ended up in my shop. The movement was clocked at 9500 BPH while it should have a normal rate of 9000. I observed the hairspring was "sticky" and assumed magnetism or oil. The spring was cleaned in One-Dip, eliminating the sticky condition and I was confident the fast-rate issue was resolved. With the regulator in mid-range, it now clocked 9072 BPH...better, but still a gain of 12 minutes per day. Only by moving the regulator to the most extreme slow position have I been able to get the balance to run at 9000. Balance action isn't great - about 180 degrees total oscillation. After searching this forum, I saw another similar complaint from several years ago. Other than poor hairspring pinning by Hermle, can the fast rate be caused by anything else? Thank You, Bill When Fried and de Carle haven't discussed it, ask the NAWCC Message Board!