Copenhagen, in German occupied Denmark, was a favourite spot for German officers on R & R. In an effort to 'get their own back' members of a Danish resistance group opened up an Arts and Craft shop specializing in scroll work. They offered to personalize the officers side weapons by fitting ivory handles to their Lugers and cover the gun with artful designs and scroll work. Some were customized as gifts for fellow officers serving on other fronts. Trade was brisk, but what was not explained was that the barrels were being modified by reducing the diameter inside and weakening the breach of the gun, which, when fired for the first time would blow up in the officers face. Of course these guns were never fired while the officer was on leave and any 'accidents' at the front were put down to 'casualties of war'. According to Harry Jensen, the only survivor of the resistance group, hundreds of these Lugers were modified this way before they closed shop and fled.