Thanks guys.Here is a picture(sorry about the quality,cell phone pic)of an adult male B. caudalis,just outside Springbok locality.
And the female that dwarfs him.He is about 35cm.
@nflooi:I'm not 100% sure of the locality of the female.She has the blue/grey markings on the head of an Namakwa caudalis, but its the first one with such bright and broad pure white markings in between the saddles that I've seen-if its from there.
Maybe some experts in the Caudalis field will post their thoughts on that
.The previous owner has had her for about 3 years before me.
She is very docile for a horned adder. Eats half grown mice and drinks out of a water bowl(which is quite strange for them from that locality).