The Simpson 59 is a terrific brush from the Grey Box era. Best badger hair then is, imo, superior to the best badger available (or what is harvested) today. The Dovo came to me with a very fine edge. Naturally over time it has needed refreshing and I am contemplating going back to my Norton 4/8k and progressing through my Shapton 16k. Still gave a pretty good shave today, but I had to work too hard to get it. Maybe I'll start on my Naniwa 12k and Shapton and evaluate the results. Feels good in the hand, I must say.