Thank you, Caroline, for your response. I have been researching vintage machines and I agree with you that it was probably made by White Sewing Machine Company. I have not been able to find the Serial Number on any of the sites. But, I'm not giving up!
Originally Posted by
Caroline S
I am going to guess that your Mason Rotary Treadle was made by the White Sewing Machine Company circa 1900 or before.