They're similar in appearance to Tucker brushes (i.e. Unger Hi-Flow), but they're not Tucker brushes because of the stipling effect on the reverse of the stock.
Tucker brushes don't display stipling as much as the brushes shown on ebay and Tucker brushes also have two blue labels running vertically at the ends so IMO they are not genuine Tucker brushes.
I could be wrong but I don't think so
Tucker dupont bristles retain their shape better and longer than imitation copies. I know because I've used and compared both types. Imitation brushes don't give value for money as they quickly lose their shape and effectiveness.