After? (My father was born in 1921 and left Berlin beginning in about 1936, for school, but may have returned up until 1938.)
ML/NJ
The 1953 date applies to the child of the deprived former citizen but is not relevant in your case since it was your father. If your father had been a citizen and fled the country for racial/religious reasons anytime before November 1941 (11th Decree of the Reich Citizenshp Law), then you will be eligible.