Seems like I'm always finding something in my boxes that I forgot I had. These are, I believe, U-243s. The white one on the left is easy enough to find. The middle one is a blue tone, a bit darker in hand. The right one is one I just 'recovered' from one of my boxes. In fact, it is from a collection that I bought several years ago. I just noticed today that it has some blue glaze globbed on its otherwise white exterior. Neat line up of not so uncommon porcelain signals. Enjoy!