I just want to say THANKS for this topic. I own a beautiful framed print of Otto Kretschmer sinking Patrolus und Laurentic.The seller had it framed,double matted and there is a U-Boat badge on the lower frame.I always thought it was a cheap fake.But this topic showed me were to look ,without taking the frame apart to look at the back of the badge.Damn if it is a real one, as per the ribbons on the wreath. This print is one of the first things I bought on Ebay and one of my prized autographs.Thanks again,Vati. Unfortunatly I can't figure out how to lower my pixel rating so I can post pictures in this website//////????