Found this Rubberset 400 in the wild for $6! : r/wicked_edge
Rubberset brush sizes. | TheShaveDen
My first attempt at restoring a vintage brush. I bought an old Rubberset brush for $1 at a flea market and a 19mm silvertip badger knot from Virginia Sheng in China. :
Atlantic Salmon Flies: Don't Lose It, Reuse It - Part II (Shaving Brush Restorations)
IMCS Militaria | US WW2 Shaving-Brush
A Quick Look At Our Rubberset Style Shaving Brushes At Executive Shaving - YouTube