Hello Fellow Watch Folks: I just did a complete overhaul of a 1940 BW Raymond 23 jewel watch, Grade 540, Model 15. Complete disassembly and cleaning. It was not running before I started. Now it runs excellent, but very fast -- about 11 minutes a day. I added several timing washers (evenly), and it slowed it a small amount. I am getting strong amplitude (about 250 degrees) with snappy action. Based on the almost insignificant change I saw with timing washers, continuing to add them seems like the wrong approach. What else could be going on? Might someone have put in a wrong hairspring at some point? Need ideas. Thanks!