This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
UBootBNr . VersuchsUBoot der Howaldtswerke Kiel mit der Baunummer Christian Ostersehlte Von Howaldt zu HDW Koehlers Verlagsgesellschaft mbH Hamburg ISBN ca author PDold Image UBootBNr Howaldtswerke Baunummer Historical images of SchleswigHolstein
Page 2023 Free-images.com. All images are Public Domain