Anybody know these original smog parts...?

[midyr]

Does anybody know what this diverter valve was for? The only numbers I see are "7034481", with a "4" beneath that, and a round label on the end cap with "GF' in black letters. It would have been a take-off from a new car, both hoses still intact, the larger one "GM-330554-JB-BF" lettered every few inches, 2 raised lines running the length, one more pronounced than the other,still has the tower clamp on one end. Also have the elbow, "3942533", followed by "Atlas" within a rectangular box, followed by a "12". Probably have the pump around here someplace, but would have to do a hunt. My guess is I would have had this stuff from 1968-70 or so. Never bothered looking at any of it.

Thanks.

Lance Hill