I lived in Pirmasens, Germany in the early 60's. Our apartment was in the house of Frau Elsa Massa. She was a widow and had a son Karl who at that time was in his 30's. Elsa's husband Herr Massa died right at the end of WWII. I never knew his first name. He owned a shoe factory which was behind the house. I don't know if this is any of the family you are researching or not. Just a little tidbit just in case.