For weekends, road trips & foreign travels / explorations - a Heuer Autavia GMT, or maybe an Enicar Sherpa GMT fits the brief.
For suited & booted in town and evenings out, - a PP 1578, or a JLC Memovox - both in SG.
But I'd trade the lot (and more) for a CSL version of the 70's BMW that Alkiro photographed today, plus an Omega Chronostop Driver 

Nice challenge Harry! Thanks.
All the best
Giles