My late father's portrait

I was archiving some items and ran across these portraits. So I know this is OLD, but I hope still interesting. The portrait on the left is a sketch I did of my father in 1977, year before he died. The portrait on the right is a sketch by an artist named "Baumgarten" who sketched of my father at the 1934 World's Fair in Chicago. I have never found any reference to the artist or the Baumgarten Studio, but I have always loved that 30's style of art. I have attached the larger file of the 1935 artwork, just in case someone else finds it an interesting sample of fine artwork. And if anyone has ever heard of the artist, I would love to hear it. cheers.