Norton India Benchstone, medium (61463685630). Official Norton India line: aluminum oxide abrasive, oil stone, medium grade for producing a working edge on knives, plane blades, and chisels. Store title is Med. A grit number is not printed on the store title or the current Norton benchstone landing page we could read, so none is listed here. Specs from Norton's benchstone / India family pages on nortonabrasives.com.

The orange-brown India. Medium oil stone, not the Arkansas finisher.