[QUOTE=OurWorkbench;7801469]Definitely NOT a Japanese clone
I don't know that much about the older machines but just knowing it came from my grandmother and the cabinet is beautiful in my eyes. I would do what I could to clean it up even it only to use a little furniture polish on the cabinet. Not hard to replace cording. You may be pleasantly surprised by the stitching it produces. I would give it my best shot. Take a warm cloth to it and see how it wipes the dirt away. You don't know til you try.