Took this to the holiday meeting of the Ohio Camera Collecting Society. Everybody agrees it is cool

The Makiflex Automatic (because it has an auto-iris mechanism in the lens).

I have the Plaubel 180mm Auto Schneider Xenar, and the Plaubel 240mm Auto Xenar. Other lenses that were notable, and available in Auto, were the 150mm F2.8 Xenotar, the 360mm Schneider Tele-Xenar, and the Schneider 240mm Tele-Arton.