I'm not feeling Champion and I think it could be one of a few different companies'. Sometimes these single color swirls can be tough to ID with any real certainty.
Almost certainly. Imagine if you were a kid who just spent your allowance on a bag or box of marbles. You would be pretty unhappy if you found out that you got one less than you paid for.
We might think these are cool and worthy examples but they are worthless for their intended purpose.
The only Pelt I see is upper left. The rest appear to be West Virginia Swirls. Pelts will most often have 4 ribbons running seam to seam - two on each half of the marble.