Help Needed Dating Vintage Trouser Pants

Hi all you lovely, most knowledgeable people!
I've come into possession of a really neat pair of vintage trousers and am curious to figure out when they may have been produced. I'm thinking they were produced somewhere between the 30's and 60's but obviously that's a pretty broad timeframe. I'm not an expert in fabric, so have really just been trying to date these based on the zipper but am sure the fabric itself will probably glean a bit more insight into when these may have been made. Please let me know if you'd like to see additional photos/specific details.
Thanks so much in advance for your help!

 

I get a sense of 1970s on these. Based on a few things, but mostly the width and large size of the belt loops and the cut of the pants.

 

Awesome! Thanks so much for your help. The only thing that made me think these could possibly be a bit older is the shape of the Talon zipper. Every resource I've looked at seems to indicate that that particular size, shape, & metal was produced somewhere between the 30s-50s‍♀️

 

No labels or laundry instruction? they dont look 50s to me. The wrong shape

 

No tags of any kind

 

Yes, 1970's. Is the fabric heavy (thick) and dry feeling to the touch, with no sheen? They may be made of denim.
Marian

 

Yes. Heavy, textured, and no sheen.

 

Rad! Y'all are the best

 

Reminds me of the Monkees