large watches dont have deployants... i think it's because they've found that the clasp that is held by pressure can't hold together/stay shut because of the weight of the larger heavier watches... but i also it has something to do with bigger watches.. Think about it... 5205, 5135, 5074... i'm sure there is a reason.... yet the perpetual chronos do have deployants and the 5270 is fairly large... riddle me that...
but im pretty confident that they have reasons for everything
-rob