The green one is this link below. It’s been well worn over the last three years and has aged well, I think.
https://bulangandsons.com/products/the-ripstop-watch-strap?_pos=2&_sid=cf76234da&_ss=r
The blue strap is the same strap but royal blue. It’s brand new. Both are very comfortable
https://bulangandsons.com/products/the-royal-ripstop-watch-strap?_pos=3&_sid=cf76234da&_ss=r
The story behind the strap can be found here,
https://magazine.bulangandsons.com/blogs/lifestyle/the-ripstop-watch-strap
I think the green one is a perfect fit for a vintage/standard speedy. I used to wear it daily on my 80’s Speedy. Here was the strap when it was brand new
Now it lives on my ‘61 Nivada CASD but it is currently off getting serviced, so it’s on my 3861 for the time being.
and I guess one more photo of it haha.
I think it’s quite versatile on tool watches. And yes, over time it has gotten lighter in color.