Michael Friedsam
I have not found any records of business with Michael Friedsam other than the reference in the 1938 New York Sun article. Michael Friedsam was the nephew of Benjamin Altman who is also listed as a customer of Charles F. Biele and Sons.
Additional information on Michael Friedsam can be found at the following links:
​https://en.wikipedia.org/wiki/Michael_Friedsam
http://web.sbu.edu/friedsam/archives/friedsam/col.%20michael%20friedsam.htm