The 5905’s height and diameter are a bit big for my wrist but the platinum is spectacular to look at! I seldom wear my 5930, too busy? The 5270 also spend a lot of time in the safe. Just picked up Lange’s version of the 5170, love the simple, no date layout, and the height and diameter fits my wrist. I haven’t seen the 5172 but it’s similar size and blue dial are a notch up in my opinion!!