either way you can't go wrong...
having said that - i was exactly in the same decision point between 720 vs 721...
721 emerged as a choice for few specific reasons, (i write it as you hesitate w.r. 721)
1) there are very few anonymous dial watches (calif. dials), so absolutely unique. here YOU are the brand ;-)
2) albeit the dark history, it is part of 'history' that we need to remember (& not repeat)
3) 720 dial with name is common (in 45mm & 47mm)
4) there are very few takers of 721 for the same 'history' reason - so rare to see on another wrist so easily.
i didn't regret the choice & either you choose 720 or 721 you'll neither regret - both are beautiful pieces !
go for it !!
Best,
mahesh.,