First of, let me start by saying that I'm not a tsuba guy. I can appreciate some schools more than other (Akasaka, good Heijanjo and Oni) but that's about as far as it goes. I've picked up this tsuba for it's composition which I found very playfull, the tsuba actually being used by Shoki and the Oni as a background for their chase. I found the Oni gripping around the mimi with it's claw a very nice addition. The nanako (on the plate, not on the rim) seems to be fine and well executed.
Measurements are 5,5cm x 6cm.
Any ideas on the work or maybe a hint as to which school would be very much appreciated. Also there's some green oxidation at the top which worries me, any tips to remedy that would also be very helpfull.