Please clarify about the Milgauss

[Wisher]

I'm not that familiar with the Milgauss, so I thought I would lazy and ask. If I am correct, there are three models: a black face with green glass (the GV),a blackface with clear glass, and a whiteface with clear glass. Yes?

And the GV stands for?? Glass Vert? Or something like that?

Thanks