It's been some time since we mentioned the crazy kids who work at Tokyoflash Japan, notorious for its brainbuster alien-tech.
Look upon their latest work, ye watch lovers, and despair.
The Kisai RPM Acetate may look like a Tron disc, but it's not nearly as confusing as some of the other Tokyoflash puzzlers.
The RPM is inspired by turntables and DJ culture, and the Acetate is a revamp of an earlier stainless steel version.
It's made from glossy, hand-cut acetate and is available in white, blue, and a range of patterns like Tempest, above.
All come with a seamless "butterfly" clasp. It's USB-rechargeable, and a 3.5-hour juicing will keep it going for a month.
Telling the time with the Kisai RPM is fairly straightforward (it's no Sensai Alloy). You have to push a button to light the time-indicating LED display, which consists of concentric rings.
The bars in the inner ring show the hour in the same position as numbers on a clock. The outer ring represents five-minute intervals, also positioned like on a clock face. The smaller bars at the top represent four one-minute intervals.
If you can't figure any of that out, at least there's an AM/PM indicator. Somewhere.
There's an explanatory video here.
The Kisai RPM Acetate is available for $159 from Tokyoflash.