Admittedly, the other two have simpler faces, and may more obviously fit the "stealth" theme you suggest. (And, of course, as you allude to, the print on the Patek's dial rather gives away what is going on.) But still… (I'm turning this into a which watch would you choose contest, I'm afraid) Who could resist the 5101P??? It's such an "everyday" look—and yet… 

Best to you! Stay safe! FH