On unmarked pieces it can be a almost impossible task to make out who the maker is, but with hands on inspection a expert can usually tell about the period, and sometime the maker. I'm not a expert here, but close examination of the bottom can sometime give the clues to age. As for your other items being Blue Willow they don't look like it, they do appear to be flow blue. Basically you have Blue and White, which is basically that Blue decoration on white, using colbalt to get the color. Flow Blue and white, has a appearance of the blue colbalt color flowing in the firing process, that is it has a smudge look about it. Blue Willow has a tree in the art, Willow tree, this decoration was very popular in the early asian china.
