Thanks for the replies. 
 
	 
 
	I didn't know who the figure was and what the hitsu-ana were. I thought perhaps the empty hole had lost it's filling 
 
	 
 
	Perhaps not in the best condition but most old tsuba's are unaffordable for me, so I'm quite happy I got one I like for 70 euro. 
 
	I did some research on restoration and I was able to remove the thick rust in the photo's with vinegar, a toothpick and cotton swab. Then I gave it a coat of Renaissance Wax.
 
	The filled in hitsu-ana did become a shiny bright copper color from the vinegar and I was kind of disappointed because I lost the patina.
 
	But to my surprise it went back to it's original dark color in about 8 days !
 
	 
 
	Here's the backside photo.