I'm trying to choose the similar brush that I have from the 70's (I'm embarrassed to say). It's the white hair brush, 1/2 round, very stiff nylon bristles. I have tried the (stanley) Lady Catherine and it's just not quite right. Any suggestions? My brush seems like it's a little stiffer than the Lady Catherine.
That was a Fuller half-round boilable all-nylon hairbrush, which is no longer produced. I used it myself until I plain wore it out down to a nub about 1980.