Yes, it's a Preben Holm freehand. The same stem logo can be seen here (I watched the video),
http://www.pipephil.eu/logos/en/logo-p5.html
With the story of Preben Holm here,
https://pipedia.org/wiki/Holm,_Preben
Seems you should be looking for a Ben Wade estate (they can be found at many online sellers, and of course ebay...)
Some examples here,
https://www.smokingpipes.com/pipes/estate/denmark/index.cfm?tag=300
That notched rim is design feature seen on some of his work.