Interesting Differences Between Two Pendleton Westerley's (The Big Lebowski)

[NathanM]

I was lucky enough to pick up the Westerly (Right) for a steal at $40. It's my go-to. I just found this other Westerley (Left) today and the differences are interesting.

The material on the left one is a bit more itchy and appears darker and is also lighter in weight than the one on the right. The zipper pull is also a YKK. The tag puts it into a similar time period as the one on the right.

Were there variations in material feel etc and isn't YKK a newer type of zipper.