[Retr0id]

The problem with doubling the speed of the small hand is that it would subtly imply that unix time will wrap around to 0, Jan 1st 1970, which is a common misconception and of course not true - it wraps to somewhere in 1901.

I've considered annotating the left side of the dial with the negative numbers also, e.g. ff (-01), etc., which would make it clearer that there's a discontinuity at 80, but it's also a lot of visual mess and on balance I prefer the cleaner look.

I hope that anyone wondering "why 0x80" will be curious enough to go read the linked wikipedia article, which goes into much more detail.

[Retr0id]

Here's a version with negative numbers added to an inner ring: https://retr0.id/stuff/2038/v2.html