Vintage Levi's and bonus Jean nostalgia

How come when you can't find something anymore it becomes more desirable to you? It seems you can no longer find jeans without 'stretch.' The problem with them is, if they fit well in the change room, they don't stay that way. They start to 'bag out' once you wear them.  Not so with the jeans of my youth. 

I was intrigued by a pair of Levi's I saw in the vintage store for only $11, with all the tags attached. I didn't buy them right then, but overnight I thought they would probably fit me. I went back and they did fit!

They are super high waisted, and are made (in Canada!) of really thick, unyielding denim. I think I should be able to get away with wearing them with a longer top without it looking too weird.  My internet research on them didn't dig up anything about them. I can't tell from the label if they are late 70s or early 80s.  What do you think?

And thinking about jeans, since living in Alberta I've come across a few references to the Great Western Garment Co. which operated a factory in Edmonton until 2004.  Apparently, it was one of the only places that hired non-English speaking women.  When I was a kid a popular brand, the "GWG's" came from there. I think I had a white pair in the mid-1980s.  Check out a commercial from that era: