This is interesting, I found Fred Franz's and Nathan Knorr's Social Security numbers. They are:
FREDERICK W FRANZBorn: 12 Sep 1893
Died: 22 Dec 1992 11201 (Brooklyn, Kings, NY)
Social Security Number: 080-42-6420
Issued: New York
NATHAN KNORRborn: 23 Apr 1905
died: Jun 1977
last residence zip code: 11201 (Brooklyn, Kings, NY)
Social Security Number: 131-38-8638
Issued: New York
Joseph Rutherford had no social security number!
This information came from the
Social Security Death Index.