--in the U.S., Social Security Applications and Claims Index, 1936-2007 (per AncestryLibrary) there are TWO records:
Joseph Lefkowitz -- Birth Date: 10 Sep 1885 -- Birth Place: Hungary -- Father: Ignaz Lefkowitz -- Mother: Hannah Kiss -- SSN -- Signature on SSN Card: Jos Lefkowitz -- Relationship of Signature: Signature name differs from NH’s name. -- Notes: Apr 1937: Name listed as JOSEPH LEFKOWITZ
AND - for a diiferent SSN -
Joseph Lefkowitz -- Birth Date: 10 Sep 1883 -- Birth Place: Hungary -- Father: Ignatz Lefkowitz -- Mother: Hannah Kiss -- SSN --Notes: Dec 1936: Name listed as JOSEPH LEFKOWITZ
It seems like the same person applied in Dec 1936 and Apr 1937 and was uncertain of his Birth Year, giving 1883 one time, 1885 the other
