DOB for Brian David McGhie - 21 June 1932
His marriage and Birth records are not yet available - only his death record - which shows his DOB.
Unless he is mentioned in the newspapers before 1956, There is not much else in the way of information available - at least for now. .
NZ has some very strict rules about when information becomes available.
100 years for birth records, 80 years for marriage records and Immediate for death records provided the person has passed their 80th birthday.
Since Mr McGhie died before his 80th birthday, his death record would not have been immediately available. It only became public in 2012 after the 80th anniversary of his birth passed.