I think you should go with omega if your dad is comfortable with that brand.
I dont know what version of the constellation he has but if its like most images on google search is (gold/white dial), it might be a bit dated, and that seamaster aqua terra might be a very nice more up to date look. Maybe a tad large but still smaller than your watch.
Still if he's into bond films, you cant go around rolex imho.
__________________
Z4 3.0i | ESS TS2+ supercharger | Quaife ATB LSD | Brembo/BMW performance BBK front/rear | Schrick FI cams | Schmiedmann headers+cats | Powerflex/strongflex PU bushings | Vibra-technics engine mounts | H&R anti rollbars | KW V3 coilovers/KW camber plates | Sachs race engineering clutch | tons of custom sh#t
|