This is a sewing machine I got from an estate years ago, I have been storing it for years. I know nothing about sewing machines but I have done some research. It is in a bentwood case that comes with the key.
Usually attributed to Grant Brothers, this circa 1870 "New England" type forms a chain stitch using a Raymond looper. It incorporates a four-motion feed rather than the upper feed found in many similar machines. Manufactured in the USA.
The sewing machine was developed by Isaac Singer. This was one of the first domestic appliances made. The sewing machine was really put to work during the Civil War when there was a huge demand for ready-to-wear uniforms.