I am trying to find a manual for my sister's Singer. It is a Singer Fashion Mate. She bought it in 1978 from a Sewing Center in St. Louis. It has a tag on the bag that says "Made in Germany" and has the number 621B also on there. I have looked this machine over and cannot find a serial number anywhere. I have tried going on the internet to find a manual, but no luck. Seems 621B does not come in as a Singer Machine. Is anyone here seen a machine like this one? Can anyone tell me where to get a manual, preferably one I can download free? I want to make sure I oil it in the right spots.