Check this out. They actually have new hats without the H, but they are clearly distinguishable from this hat because they lack a clearly defined left point.
http://www.isportusa.com/index.asp?PageAction=VIEWCATS&Category=628
From one of the links above there’s a list of gangs and it includes descriptions of caps worn:
Houston Astros: “H” stands for Hoover; folk.
Part of my interest is this case- and that a group of young men recently moved into my neighborhood wearing some classic (according to other neighbors who know about such) gang colors and clothing...so I’m trying to be aware.
The H is on there. Look inside the star in the bigger picture.