Petrus Johannes Slabbert (Piet)

Piet was baptised PETRUS JOHANNES
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSVF-TWB8?i=989&ca...

Slabbert, Petrus Johannes
Born: 9 Oct 1912
Died: 31 Dec 1968
Buried: Zandfontein Cemetery, Pretoria, District Pretoria, Gauteng, RSA
Note: Petrus Johannes Slabbert Husband of Hendrika Susanna Slabbert. Grave no. N227.
Revision: 17 and before

DoB on grave is 9 Oct 1912 and on baptism record is 19 Oct 1912... think it must be the same person though??
Confirmed through his marriage to Hendrika - his address given is 514 Servaas St in Pretoria, the same as many other family records
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CS27-CSB7-Y?cc=282...

Estate files
https://www.familysearch.org/ark:/61903/3:1:3Q9M-CSDZ-LLKQ?i=420&ca...