Having had a look at the 174 in greater detail, I'm inclined to say that one's genuine. It's a Pro brush and you can get a picture of the ferrule crimping
here. It's not the best picture to compare with but I'd say it looks as though they are the same.
As for the 136, I can't find a good picture but I agree with queenofdisaster. I think it's unlikely to be genuine as the crimping on the ferrule is almost non existent and the handle has a sparkly finish.