The only one I found is an illustration in Profile Publications No.40 for the Me 109E-7 Trop, which shows an aircraft from III/JG 77 in Greece, 1941, which, apart from the unit badge, has a cartoon style pigs head under the cockpit. There is no text attached to this, and no explanation in the book.
“O Lord God, let me not be disgraced in my old days.”
'We few, we happy few, we band of brothers'