King label demo colours

[Liamgp]

Does anyone know if there is any significance between the white and yellow King lable demos? 

Is one rarer than the other? Reissue? Or just one of these things?

Thanks!

[The Yank]

I believe King used the white label promos until late '67/ early '68 when they starting using the yellow 

label for promos. 

 

[Liamgp]

17 minutes ago, The Yank said:

I heard that too. But my mate just bought a yellow Charles Spurling and mine is white but they are identical so?