I have a Gustav Becker 400-day clock that instead of a glass dome, it comes in a mahogany case. I notice in an old Tran Duy Ly price book that these tend to be higher - perhaps not many were made in the wooden case display. It has a disk as the pendulum. The movement back is shown below and has a number of 1991164, and matches the number on the pendulum. I believe the clock is from around 1905. I am not sure of the exact plate number, since more than one seem to fit. I cleaned the movement and it is freshly lubricated. I used a .004 inch suspension spring and I am trying to size the length properly to get the timing right. I am an inch or so above the floor of the case (it looks high) and I still must shorten it as it is moving too slow (outside the range of adjustment of the pendulum). I can only get the pendulum to swing 180 degrees, although it is enough to work. Does all this sound normal for this clock? Thanks!