He covered up the Nazi Totenkopf, and now we see he has 1919 on his arm. And, while I don't want to assume anything and I can't see the whole context...1919 is the year the German Workers Party was formed. Which feels like a deep cut Nazi tattoo. Also, the 19th letter of the alphabet is S. So...yeah, not looking good for the silly young lad who innocently got an SS Panzer Totenkopf tattoo without knowing what it means.