Sennheiser 555 cable color coding?

[mnhnhyouh]

Right, I have just chopped the big fat headphone jack off the end of my Sennheiser 555 cable, along with a bunch of cable.

I am wondering if anybody knows the Senn cable coding?

I have

Blue
Red
Black
White?

h

 

[mono]

White = L +
Blue = L -
Red = R +
Black = R -