A watchface along the lines of the Meistersinger Salthora Meta
http://www.meistersinger.net/collection/single-hand-watches-models/sam907/infos/Model.html
would be quite unique.
And to make it perfect: Add an additional hour window at 6, layout mirrored from the one at 12, with configurable UTC-offset? So, hour window at 12 = Local time, hour window at 6 = Remote time.
Oh and maybe the minute hand, colour configurable.
Ok ok, it's carrying me away...