P.a.t.e.k P.h.i.l.i.p.p.e Release Aquanaut Travel Time. "Super Clone"

Instead of having a separate 24-hour hand with corresponding scale, they use two hour hands (one solid for local time and one skeletonised for the secondary time) that correlate to the main 12-hour scale. A pair of home and away day/night indicators then serves to inform you which part of the 24-hour cycle is being displayed. It’s a lot more subtle than a GMT display because when you don’t require the use of an additional time zone, you can hide the second hour hand beneath the primary one.