Wouldn't it be better to have a non-hacking movement that was +5 seconds a day or better?
You could probably argue "but the hacking movement has the potential to be regulated and adjusted to atomic clock standards by a good watchmaker".
But it's not, so it isn't.
And then there's quartz, but we don't mention that.
You could probably argue "but the hacking movement has the potential to be regulated and adjusted to atomic clock standards by a good watchmaker".
But it's not, so it isn't.
And then there's quartz, but we don't mention that.