Knitterpam

My friend has a treasured, toy sewing machine that appears to make a chain stitch and is probably for the 1920s. I can't figure out how to include images of it, but it is very similar to the Casige toy machines. It has decals, but the only marking is "Made in Germany". there is no Eagle & Key logo or number on the throat plate. Any information or direction would be helpful for her.