Looks like 1703. By the looks of the date and how many used to date long ago. Maybe March of 1917. Or too old? Or maybe it's March 17. Maybe some one's birthdate. Any other dates any where else that may have been camouflaged? My neighbor often labels along (not on) the binding in the same color thread. My sister-in-law was looking for label on one of her quilts. It was a Dresden and the label was in a shade darker on a blade near the binding. Just ideas where you may find another clue.