The Dead Flipper was announced by BBV in April of 2016. As you can see by the picture above, the dolphin has the X in place of the eye. When I was doing some research into the Friendly Flipper “Flipper Box”, I noticed the date and striking similarities in the 2 boxes. I never noticed this before. The photo on the right is the Friendly Flipper version with no eye. The Dead Flipper came out in April 2016 and the Friendly Flipper version in April 2017? I am not sure of this but I found the 1st photo posted on the Friendly Flipper Facebook page around that time.
Here are a couple posts I have made about these: