We have received many questions on the leather vs PU cases for the new HP15c calculator.
The first comment that comes to mind is that it is not "either/or". When you select the Leather version, you get the leather case plus the case the HP15c comes with. So if and when one of the two breaks down, you still have the other.
The second: here is how the HP15c CE PU case looks like:
The leather case is a true Ubrique cowhide leather: (the one sold with the HP15c is the black model). However, it can be available in 3 colors: Burgundy, black and brown. The one that looks ok with the HP15c is the black one!