I am new to this, not even amateur at best so I cannot offer any opinion, but as I learned from the people on the Tsuba FB group, 10 of mine that were purchased from a woman that received them in 1968 - all fakes/cast copies.
I did learn to check the casting lines, here is a late 1800 or early 1900 fake. Er,let me rephrase that in ebay terms on mine "Tsuba art"