A Dudley Vincent you stated? Wonder if either of these could be the right one.
Death indexes New Zealand
Year of death and reg 1976/33470
Name Vincent Eric Dudley
Date of birth 27 September 1912
Year of death and reg 1996/38306
Name Vincent Dudley Ivan
Date of birth 18 September 1915
Dudley Ivan is in the same cemetery as Eric. Not that it means anything but ............. I cant even check his birth to see who the parents are cause the birth indexes dont go to 1915.
VINCENT, DUDLEY IVAN
Plot : PROTESTANT LAWN D Row 8, Plot 7
Interment Type: Burial
Title: MR
Surname : VINCENT
Given Names: DUDLEY IVAN
Age : 81
Gender : Male
Occupation: RETIRED
Date Of Death : 09-Sep-1996
Date Of Cremation : N/A
Date Of Burial : 13-Sep-1996
Funeral Director : TILTON OPIE AND PATTINSON LIMITED
Head Stone Details : Y