Apple Iphone's Weird Alarm Clock Ring

I noticed the alarm clock ring where you adjust the hour and minute on iPhone has a finite number of hour and time integers as array instead of repeating 12/24 hour or 60 minutes and if you scroll enough like 10 seconds or so you get the final hour 16.39. Is this some easter egg maybe a special hour for Apple or some lazy work? I also wonder is there any reason in particular why people did it this way?