I bought my first transferware a few years back at a Goodwill in Littleton Colorado, while looking for my wife tea pots. I have extensively looked for the mint mark maker online and I just cannot find a match.

I put this picture into Google lens and it came up with a similar jug that is the exact shape of mine, except the mint mark shows it to be an Arabia Finland. I have searched Arabia Finland's mint marks and none of them I have found match mine.

This jug to me is an enigma and has taken me down a deep rabbit hole. If anyone can help identify the manufacturer I would greatly appreciate it.