You're right, I found some references to it from 2011 and maybe it goes back longer. My mistake. Will edit.
When I found out about The Line some time last year, the collection had silver hardware. But from when it began, I wouldn't know. I know the regular line uses riri zippers. From my one experience with the regular line, the leather is thick and really nice. The sizing of their jackets run very small though. I fit in a size 2 with Julius which I would say is a medium. I got a double rider in a size 3, which is designated as a large in Backlash's sizing, just to be safe. I couldn't even get my arms all the way through the sleeves properly. Even when I did, the zippers won't even meet to zip up the jacket. It was more of a small rather than large.
Here are some photos of the current collection and past collections: