I just posted this on the Token of GB Facebook page and thought it might be of interest here as a small exercise. We often trip over describing different forms of hada and the more variations we look at the easier (hoepfully) it should become.
We have done this before but on a day that is not much good for anything else I thought you might want to exercise your grey matter with a small recognition exercise. The attached images are from 4 different swords all I believe to be fairly representative of their schools. Rather than trying to jump straight in to attributing these to a school, which without a lot more information would be a lot of guess work, See how you would describe the hada you are seeing.