There is a Davis Treadle sewing machine in our family's estate sale. Hoping it will be mine soon. The serial number is 559288. I would like to know it's age. Is there any way to find that information.

If you Google "davis sewing machine serial numbers" you find this:
https://fiddlebase.jimdo.com/american-machines/davis-sewing-machine-co/dating-davis-sewing-machines/ 1890's.