Yes the black and white marans are called 'black silver' or 'birchen'
There was a hullabaloo a few years ago when they were introducing the color to the APA because birchen as a color includes lacing one third down the breast but the marans version is basically supposed to be like the black copper pattern except white based instead of red based, so I guess it's now supposed to be black silver......
I guess....
Anyways, I have lots and lots of cockerels if you happen to drive through Montana.... I have to butcher around 40-50 of them. I get to keep 10! Yay!
In the US, Black Silvers have a solid black breast and Silver Birchens have lacing on their breast. Basically the same bird except for the silver lacing.