Eton College OTC

[hertsmil]

Hi,
was the cap badge for Eton College only produced in white metal.
I know that in K & K he states that in is in white metal but have come across this badge and it does not look like it is in white metal but brass, I also think that it has lugs on the back not a slider.
have looked at Alan O's album and he has a white metal badge but not sure about this one.
Any help would be great.
Andy