I have a Seth Thomas West Minster Chime mantle clock (A400-001) that my parents got back in 1956 (I was 2 years old) I remember hearing this clock all my life. In 1997 I had it repaired by a shop that put in new pivot bushings. In 2008 I took it apart and cleaned & re-oiled it (except for the springs). After that I had to move and did not have a place to set it up. A few years ago I gave it back to my mom for a short time (less than a year) before the time spring broke one day while I was winding it (she often forgot to wind it). My mom is now on Hospice at 94 and I want it working again before she passes. I have two issues: One is the time spring. As i measure it, it is .709" X .017" X ~ 43". The strike spring is also .709" X .017" (length unknown) though I saw on another thread of an A400-001 from 1959 that the two were not the same on his movement. I found this spring .709" x .017" x 43.3" Hole End Mainspring I was going to just swap the barrel from strike to time position to get it running but am not sure about that now. And that would put the less powerful spring in the time train. Also I can not find the winding key. The shaft is 4mm and I get confussing info on if a #7 is 3.8mm or 4mm. I see them listed both ways. A #8 is a 4.25mm I understand. The second issue is the face plate. I was polishing up the brass and had taped off the numbers so as not to damage them, however, the inner surface of the ring is textured and came of on the tape, much to my surprise. How can I repair that?