This is the model 89, the 'Lady Kenmore'. It has a nylon cam stack. Mine doesn't quite run yet (it's getting there):
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It's made in W. Germany by Gritzner-Kayser. There were versions for Pfaff, Gritzner, and Kenmore. It's a model that's considered desirable and the one you're looking at is in very good condition -- better than mine. I don't have a manual.