Bought this pair from an estate sale, overall in pretty good shape but I will need to find a mica globe for the 327. The previous owner was running it on kerosene (has a preheat cup in it), I assume if it was designed to run kerosene it would also have a k designation?
Can you post a picture of the air tube up by the mixing chamber? If it has a couple of dimples they are holding a air restrictor that make it a K lantern. 427K - The Mountie
It doesn't look to have any dimples, does appear to have a large amount of carbon buildup so I imagine it was designed for gas but being run on kerosene.