Name, year and country of marriage from search on New Zealand BDM website in October 2023:
1946/19923. Bride: Doreen Thelma Mitchell. Groom: Colin John Davis

Full date of marriage of 23 August 1946 from further searching in October 2023 on BDM Search by incrementally changing the date range for the marriage.

New surname, year and country of death, date of birth, from death search on New Zealand BDM website in October 2023:
2015/26702. Mandahl, Doreen Thelma. Date of birth: 10 May 1928

Full date of death of 29 September 2015 from further searching in October 2023 on BDM Search by incrementally changing the date range for the death.

Obituary found online in October 2023:
https://deaths.manawatustandard.co.nz/nz/obituarie...obituary?id=40026718
MANDAHL, Doreen Thelma:
Of Feilding. On September 29, 2015, peacefully surrounded by her loving family at Ranfurly Residential Care Centre, aged 88 years. A much loved mother, grandmother and great grandmother. "Rest in peace" A Memorial service for Doreen will be held at St John the Evangelist Anglican Church, Camden Street, Feilding, on Monday, October 5, 2015 at 1pm. Messages C/o 183 Manchester Street, Feilding 4702.
Published by Manawatu Standard on Sep. 30, 2015.

Name, date and place of birth and death, place of burial, photo of headstone, from Find a Grave website found in October 2023:
https://www.findagrave.com/memorial/205811803/doreen-thelma-mandahl
Birth: 10 May 1928
Death: 29 Sep 2015 (aged 87)
Burial: Feilding Cemetery, Feilding, New Zealand