I'm not sure how much of the story is fact or fable.
As the story goes, this was one of two jugs given to my father from his, "Goomba" or godfather, at 60 years ago, if not more. Goomba was an Italian immigrant. They were given to him by an elderly (at the time) lady who was also an Italian immigrant. According to the story, it is an old Italian wine jug. It looks like a dragon, or sea monster. Ithink it looks Mayan, but the maker's mark precludes that. That's the story. Now I'm ready for your collective wisdom and knowledge to rain down on me!

It isn't an Italian mark. In the Latin alphabet K, Y and Z used only for writing words of Greek origin. The letters J, U and W were added to the alphabet at a later stage to write languages other than Latin. J is a variant of I, U is a variant of V, and W was introduced as a 'double-v' to make a distinction between the sounds we know as 'v' and 'w' which was unnecessary in Latin. I can think of only one ceramics company, Keramos (a Greek word) that started with K and that was half a century ago.

Interesting!