Potential red herring, but, only because of the birth year and mention of Brooklyn, New York in first post, throwing it on here for further checking.
SSDI has an entry:
Age 72
Given Name Harriet
Surname Franklin
Birth Date 31 Dec 1920
State Illinois
Last Place of Residence Brooklyn, Kings, New York
Previous Residence Postal Code 11201
Event Date 25 Feb 1992
(eg. "State Illinois" - perhaps someone more familiar with the SSDI can advise what this section of entry refers to - I think it is which state originally issued the SS number)