Old enameled cast iron dutch oven from Denmark(?)

Any info on this enameled cast iron dutch oven would be appreciated, age/origin/history etc. I like it very much. So much in fact I had to hide it at an estate sale I was working. Starting price was only $12, which I would have easily paid, but I knew it would go almost immediately at that price so I had to play dirty that day. No information regarding this manufacturer that I could find on the internet. Makers mark is a J laid on top of an R. If you can speculate on value go ahead I'm curious what you think.