Campagnolo "skunk works"??...maybe....
Anyway, aside from Titanium at the pivot bolt, I don't think the upper pivot design was something they really poured too much attention too, so if anything, this was definitely a one-off from the company or anyone else out there that might have needed it for a specific frame/gearing configuration.....I guess i'm pretty much repeating what repechage said above....

Chombi