People often confuse the different Conventions so hope this helps.
The Geneva Convention (1929) was signed at Geneva, July 27, 1929. Its official name is the Convention relative to the Treatment of Prisoners of War, Geneva July 27, 1929. It entered into force 19 June, 1931.
It is this version of the Geneva Conventions which covered the treatment of prisoners of war during World War II. Geneva Convention (1929) - Wikipedia, the free encyclopedia International Humanitarian Law - Geneva Convention Wounded & Sick 1929