First of all, you are from Northern Europe? Where in Northern Europe as i did not recognize that country name so I am assuming it is not a country.
In your area there is a place called Mannheim Germany that you are more familiar with than I am. They build 6R tractors there and have built John Deere tractors for the European market since the 1950s so I understand when they purchased Herman Lanz out who also built the famous Lanz Bulldog tractor. If in your travels in Europe you could stop at a John Deere dealership to validate the Daedong claim (I have a hard time to read the website), and find it to be true, I truly would be shocked.
There is also a cab and operator station factory in Germany for John Deere. Perhaps you should see if you could have a tour there?