Spitfire Propeller Identification

Hi all, 

I’m new to this forum and being a GA pilot and collector of 2WW aviation memorabilia, I am in need of some assistance with the identification of what is thought to be a Spitfire blade. ID numbers engraved on hub are as follows. 
 

D214703

14346

RA5812

A/73  & A/76

The blade was obtained in South Africa but is now in the US, following our emigration in 2017. Measures 1.52 meters from tip to bottom of hub. 
 

Thanks, Mark