Thank you. The big one is most likely from The American Marble & Toy Manufacturing Co, most would not call it a Bennington - American stoneware, perhaps. Their marbles lack the multiple eyes seen on most German Benningtons. They also used a distinctly different blue color and the finish, overall, is notably different. The pink one looks somewhat similar but I think it's probably German - a Pink Bennington.
There are at least three more AM&T Co. marbles here. The top corner marbles are American earthenware - a different beast, probably made elsewhere. I am not too sure about the middle right one, although I think it might be German. Any thoughts will be appreciated.