Not mine, just trying to help out a pal. Made by Bell-Tex Long Beach CA. He was told it was a drag helmet but I have never seen one like it.
GV, It just looks like the early Bell full face helmet to me. I think they called them a Bell Star or something like that. Would have been made in the late '60s?
X2 for early Bell. Knew a Harley flat tracker who had one very similar if not the same in the mid 70's, fixed lense.
Indy racer Gordon Johncock used to wear one with a narrow eye opening like that one. Maybe even when he won his second in 1982. http://farm5.static.flickr.com/4059/4545193342_14826103ef.jpg
Bell (and others) experimented with a lot of different eye openings in the 70's, even ones with two separate eye holes. I think the one pictured was a Drag Race version due to it being so long below the eye opening. This would have dug into the chest on Open Wheel racers.