I remember this label!
The roughness could be a sign of synthetic content, I'm thinking.
Okay, I see, same fabric, different colors for the contrasts.
I'm so used to now, when contrast fabrics are often completely different fabrics, you know? Not that it wasn't done then, but you know what I mean.
Yes, I'm with you for late 60s. This is a great style for now, with the bold graphic appeal. Can you try it on, and see if you feel warm? That's always a sure sign for me and synthetic content!
I'm going with poly/wool blend here; Country Set used that then.