Name, date and place of birth and death, from Kim Cripps’ (nee Jamieson) family tree and updated here in June 2025.
Kim is the niece of Paul and is also the daughter-in-law of Reta Oliver (1919-2000).

Different month of birth, different day of death, place of burial, photo of headstone, from Find a Grave website found in June 2025:
https://www.findagrave.com/memorial/30874306/paul_thomas-jamieson
Name: Paul Thomas Jamieson
Birth: Sep 1947
Death: 22 Feb 1949 (aged 1)
Burial: Old Gorge Cemetery, Woodville, Tararua District, Manawatū-Whanganui, New Zealand
Plot: Grave 1F, Block 14

In Loving Memory Of
PAUL
Brother Of Noel
And Son Of
T. W. and P. Jamieson
Died 20th Feb 1949
Aged 17 Months
Gravesite Details
his details provided by James Grinlinton on 8-12-1945
Funeral Director: J Grinlinton
Funeral Officiator: Rev Skey
Interment ID: 7187

Result from birth search on New Zealand BDM website in June 2025:
1947/98929. Jamieson, Paul Thomas. Mother: Pauline Sophia Ranby. Father: Thomas William

Full date of birth of 8 September 1947 from further searching in June 2025 on BDM Search by incrementally changing the date range for the birth.

Result from death search on New Zealand BDM website in June 2025:
1949/16944. Jamieson, Paul Thomas. Died age 1Y

Full date of death of 20 February 1949 from further searching in June 2025 on BDM Search by incrementally changing the date range for the death.