Kmark,
When serial numbers were being put on the blades, there was some confusion about what the crazy westerners wanted. Someone told the kamis they wanted the maker's initials on the blade. Not understanding that the customers might be interested in the illiterate low-caste craftsmen who created the knives, the kamis simply found someone who could write, and he stamped the same three initials on all knives, regardless of who made them.
I think you may have one of those knives.