Center front is the latest version. On the right is one we made a few weeks back, but which needed a few modifications. In the back is the original version, which I made completely by hand in 2010 (it's been in my pocket for most of the time since then).
Throughout, the parts are vegetable tanned tooling leather. On the two new ones, we had the parts laser cut - but I'm not sure we'll be doing this for the production version.
We'll be finding suppliers of whole sides in the next few weeks, as well as looking into steel rule dies for making parts, etc. Expect updates.