This is my token koi, I've had it for years (beauty in the eye of the beholder) can anyone tell me what it is, I'm thinking showa or kin showa ( I know not a very good one

) The hi is very metallic and the sumi is like dull charcoal with a silver metallic under coat some of the hi is covered my the sumi. I hope the video is clear enough. educate me please.
YouTube - sage