Thank you all for the great suggestions. We now have a handle on Gussie's maiden name: Thirman or Thurman or Hurman from her daughter Thelma's marriage records.
We also got a couple of suggestions of when Daniel Deutsch passed. More research is needed.

David Jacobowitz

Researching JACOBOWITZ in (now) Slovakia
KREINIK near Sedziszow Malopolski, Poland
DANZIGER in Radom, Rawa and Warsaw, Poland