Thank you all.
Do I take from this that the Tsuba in my possession is either from the Horai school or Kaga Myochin?
I have seen the Shibui Swords web pages and I was amazed at the similarities, however there are also minor differences.
How common are these Tsuba? I guess that if they are relatively well known and written about, then they are relatively common to find.
What is the likely date of it’s origin?