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. :
Rubberset Shaving Brush Vintage New Old Stock NOS Barber - Etsy
Vintage Shaving Brushes, Lot of 4, Ever-Ready, Williams, Rubberset | eBay