Extended travel balance

Thanks for your patience during this busy season. This looks like a typical non-tilt channel balance at first blush, but there's something about that bottom fitting that's a little peculiar. However the third photo isn't very clear. I'd like a clear and close-up picture of that bottom fitting, if you can. I can then judge from there whether we can supply this.

I'm confident that we can, to be transparent; it's probably going to be the difference between a stock balance or some type of custom assembly.