I recently acquired a nice tsuba (see photo) and was lucky enough to find a lot of information about this kind of tsuba in Sosano Collection and also a big discussion at KTK #2 (2006). However, neither helped me to find out the school, place and time of my piece. Help from other members would be greatly appreciated. And a more general question: can anyone recommend a comprehensive and clear manual how to identify those parameters: school, place and time for a particular item? All resources that