Thank you all for your answers. I suspect, too, it could be a fake... it is so easy to copy such a badge. However, I have a doubt. And Michel you are right, there is too much litterature on it, this is not usual ... but exists in some case. I have wrote a letter to the U-Boat archive museum in Germany to ask their advice... In this book : "Les hommes des U-Boote", from Jean DELIZE ISBN : 978-2-35250-045-2 (I think it has been published in English), one can see two similar models. For "Herman.Z" I found three possibilities : - Hermann Zander, who was the commander of U-1205, without knowing its previous appointments ; - Hermann Zobel, who served on U-605, belonging to 9th U-Fl in 1942 - ??????? Zesch of U-96. I found the footprint of a "Herman Zesch", with a sigle N, in TEXAS, USA, in 1945, married with Evelyn Kirchhoff.... but the probability that he was the same man is near to zero, I mean. Fake or true, this badge allows me to get into this incredible world of the German U-Boot crews. Thanks again, and I continue my search.... Bison