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The aquaeros have different order numbers. You will also find this number on the box of your aquaero. The one with the older front has the number 53089 while the newer one has the number 53125. The difference is also visible:
Current one (53125):
Old ones (both 53089):
You can easily spot the difference on the IR diode. The older ones have a separate hole there while the current one is integrated into the main cut-out.