i believe these were blood splatters that was left to dry on this kris. the angles of the etch are very consistent with a slash. one the other side, about 9 inches to the point is black, which appears to be this side was facing the ground (therefore no spray mark). again, IMO, this kris was left out in the open for a while before it was picked up. by this time the blood already etched thru the blade. just my opinion