Hi - I am usually a lurker but I am so excited I just had to share plus ask a couple questions. I just picked up a singer 185J from our local thrift store. I bought it for the color but also wanted it to work. The plastic case is in good shape except for a lot of dirt (any suggestions on how to clean it?). The machine itself looks like it was barely used. Sews beautifully and needs little cleaning (although I will go over it and oil, etc). My question is where do I find the serial number and how do I get it out of the base? I'm afraid I may crack the plastic if I try before I know what I'm doing. Thanks for any help!