Tried on the 1815 Chrono yesterday (along with the Lange 1 and Dato). I found the 1815 Chrono most to my liking with a suit/dress shirt. However my shirt cuff had trouble consistently sliding over the 1815 case. I needed to repeatedly manually arrange my shirt cuff with my other hand or jiggle/shake my wrist so that the shirt cuff would clear the straight-sided 1815 case. My dress shirt cuff wasn't tight, it was the appropriate size opening. Could you tell me if the Patek 5170 has problems consistently clearing a dress shirt cuff?