Help With Dating Cotton Sweater

It is knitted with cotton yarn and fully lined. The buttons have been removed and the button holes have been sewn up. When I bought it, I was thinking 1950s because of the color and pattern. There are no tags of any kind to offer a clue. I'm doubting myself about the date and would like other opinions. What would this design be called? Thanks for your help.

 

This reminds me very much of some 70s sweaters I have owned. The design looks "tribal" inspired. If you google "vintage 70s tribal sweater" a number of images come up of sweaters similar in style to yours. Hope some more folks can help!

 

Can you show us a close up of the button holes, Diana? And... how many are there? That might be a clue.

I know Southwestern/Native American pattern sweaters were popular in the 70s, but the pretty colorway of this one seems unusual. As does the lining!

 

The brown colorway and acetate lining made me think 50s at first. The fact that it's cotton threw me off and I began doubting it was 50s. Then I began to wonder if it *was* a Ralph Lauren production. I've searched RL sweaters, but nothing like this comes up. It has 4 buttonholes. Looking closer at the lining, it does look like it was hand sewn in, perhaps to retain the shape? I don't want to list it until I can pin down a date.

Thanks!

 

Another question. Should I open up the buttonholes and put buttons on it?