Hi, have a Hermle 351-830 that came out of a regulator clock that my wifes uncle built. When it was given to me the chimes hammers were not working. I cleaned and lubricated the movement and rebuilt the movement mount in the case. Everything is working except the movement is running fast. I replaced the suspension spring and even put a longer pendulum leader on with no luck. The escape wheel is in good shape. I am at a loss as to why it continues to gain time. It gains about 2 -3 minutes every hour. Would appreciate any suggestions.