This was my late grandma's Sears Kenmore Model # 148-12040:
It is a basic machine, but sews steady and straight. I actually use it as my primary sewing machine.
I found this at a thrift store - Montgomery Ward Signature URR 251:
It's missing a lot of parts. The most crucial - motor and foot pedal. But what attracted me to it is that it still has it's original case. I think I will try to restore it over time.
UPDATE: Found a motor and bobbin cover on eBay - working good! Now I'm debating on how to fix up the case. Should I make it look like the original, or should I update it?