hi there, I just saw 620 at Bloomingdales men's floor in NYC and also there is a nice heritage perfecto(duble type riders) at bernys new york and 613ust Japan model?? <- I saw it somewhere on Japanese website. they look good for me. what is different for them compare to your 613, 618 and 626 model? I'd like to know which jackets are based for them and exct measurement. thanks