This Bari Wiking was a non-filter estate pipe, after some restoration work and conversion to a 9mm pipe
i added a bronze ring so the final result now is this:
You can see the procedure here: http://pipe-smoke.blogspot.com/2010/02/6.html
Scroll down for pipe: M6-17
or you can watch a video with slide-show photos plus music here: https://www.youtube.com/watch?v=r6oDs-DwCSw
Ladies and Gentlemen thank you for watching my effort!