I just got a vintage 1970s pair of Cinllie handlebars and they look fine. But when you take a real close look it seems like one side is more straight than the other.

Is this common?

I guess that production methods in the 70s was not as good as today. And usually when you compare old Cinelli bars they differ slightly in measurements.

What's your experience with this?

Undoubtedly, there is some variation, but i never had anything noticeable.

Could they be bent?

Yes that's what I am thinking about. If they have been crashed. The angle I am talking bout is if you look from down from topview, the left side drop looks like it's a bit less than 90 degrees and the right drop looks almost exactly 90. But it is the right side that makes me wonder.

Probably. I did my fair share.