I'm particularly fond of the MOD 66-4 standard which the Omega Seamaster is designed after:
This is the original design as set forth by the Ministry of Defence from the 1960's. This is an elegant watch design. I like the simplicity. Of course, watch makers have taken this original design and abstract it to something unrecognizable over time. See Def Stan 66-46/1
Today's MOD watchface from 1991, by contrast is less attractive. Really quite uninspiring.
Again, form over function.