If you've read the caption you now know as much as we do about what's going on, and frankly, it doesn't do anything but make the whole thing seem even weirder. I consider myself reasonably good at making at least an educated guess about these things, but how in the world you get half a year's running time, out of a mainspring barrel that in an ordinary watch would run for max, three days, with some sort of coupling system that is exact enough for good time-keeping but runs off air turbulence, for crying out loud, is beyond me. The only thing we've heard of that comes any where near it in a standard sized watch case is the 70 day Senfine and the Mechanical Nano more than doubles that.

I suppose it makes sense that it's a much smaller-than-normal system; you'd need pretty negligible mechanical loads to get a 60x improvement in power reserve, but you know, still. As soon as we have more info (as we said, this is just a teaser, and GF says they'll be rolling out more info over 2017) you'll be the first to know.

For a closer look at one of Greubel Forsey's experimental inclined tourbillons, check out our hands on, which includes a look at the theory tourbillons for wristwatches.