Jacob Saunders has generously posted a number of tutorials about Germanic working details that you can find on this site with a few searches. One in particular has some excellent information about scrolls. Try google searching using his name and Maestronet if this site's search doesn't bring up anything fruitful... or maybe someone here will post a link.
I think it might help you to spend time looking at clear and reliable (correctly identified) photos of various maker's scrolls and compare the features and design mentally. Your skill or ability in recognizing a maker's work or school of making's idiosyncrasies and working style is directly tied to what you expose yourself to.
Feel free to start by comparing the scroll you posted with the one I did. Determine what you think the differences (geometry, workmanship, proportions, fluting, chamfering, tool marks, etc) are.
There are no silver bullets. It's what you can see, what you have seen, and what you know about different schools of making.
Every expert I know or have known has a categorized and well organized photo library.
BTW: You'd do much better with your posted photos if you show the views dead on straight and not at an angle (even a slight one), unless you want to illustrate something that is only evident at that angle.