To be honest all of these pictures there are well-known shots that can be found in a couple of books about the Fokker D.XXI plane. Also most of them can be found via the Internet. So.. rather no revelation there.
Yes, not really new pics of the D.XXI.
Actually the D.XXI is not that unknown. It's fam comes from the successes in service of Finland during the winterwar. Also here in the Netherlands the type is well known, being the main fighter in 1940. I had an extensive thread about it a couple of years ago.