Another picture puzzle.
If you know exactly what this is (the white thing in the middle) you get 20 Euro (USD 30,-) in cold hard cash right out of my pocket into your waiting hand. I’ll give it to you in person, via snail mail or via Paypal.
Just post your answer as a comment below. The first person with the correct answer gets the money. If their’s no correct answer until the 1st of April, I keep the money and squander it at my favourite pub.