Christina was born on November 2nd, 1911 and her baptism took place on December 15th, 1911 in Bloemfontein.
Birth Notes
"South Africa, Free State Dutch Reformed Church Records, 1848-1956," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KZLS-K6D : accessed 10 Nov 2012), Christina Maria Susanna Maartens, 1911.