Just got this stone today, and am very excited. I need to get my haves on some more naguras, but that's another story. Before the stamps are gone, can you help me identify the markings?
The box says Imanishi Oohira model 40 "Saikoukyu". What's that last part?
Attachment 178557
Attachment 178558
Attachment 178559
Attachment 178560
Attachment 178561
I am hoping for a finisher. Does any of this refer to quality, fineness, etc?