Dating singer industrial sewing machines
This only applies to machines manufactured in the United States.
Look at the back of the base or the bottom of the machine for the "Made in Japan" stamp, along with the word "Deluxe" and a number.
In the field of clothing, ready to wear came into being, creating thousands of 'sweat shop' jobs, mainly for women and the demise of most of the genteel dressmakers and their made to measure hand sewn creations.
Check for sale listings that have photographs with them as you may find your machine identified with a model number.Pictured is my Singer treadle sewing machine dating to about 1901, previously my mother's and my grandmother's.