Hello! I think these are called "Singer type E Flexi-Stitch disks." Not sure which machines these work with, but disks with same numbers (but different design) were included with models 690U and 720/740/760, which are all pretty rare machines. If you still have these disks and have no use for them, I can buy them from you to try in some of my machines, they might fit the machines I listed above.
Originally Posted by
TnetTizzy
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Kim, thank you so much for the reply. Here are the pictures of the Singer Top Hat Cams.
