Andrew, I figured if you weren't able to find more then I wouldn't either, but I looked anyhow. All I could find that isn't already on her or her son's profiles is her son's birth certificate:
Ancestry.com. New York State, Birth Index, 1881-1942 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2018.
Name: Robert W Bull
Birth Date: 25 Jan 1940
Birth Place: Plattsburg, New York, USA
Certificate Number: 1064
I realize that's no help because you already had his exact birth date and place - sorry I couldn't do more.