Went to a antique/garage sale at the fairgrounds today & came home with this Singer. The serial number is G4818430. Can anyone tell me what model it is? Also can anyone tell me where to go for a bobbin case, needles, bobbins, etc.? The case base is pretty beat up but the hand wheel moves smooth & decals are in nice shape. What should I use to clean the machine? Thanks Tag on the machine said $75, tag on the case top said $50 & I paid $25. Hopefully I don't have a door stop.