20K4785 is a California motorcycle registration remade in Argentinian style. That’s what the rider told me when I spotted the same group in Norway this weekend. There were also three Alaskan motorcycles in the same group. 
Thank you and much greetings.
We write little, but especially when I am on the Fehmarn, remember if you saw it too.
He probably said California, and then I was wrong. Because everyone else was Florida. Those 3 Alaska probably joined later.
So I’m very glad you met them too.
Thank you very much for everything license plates you do!