I bought this case recently and thought i had seen one before ,searched the threads and cant find anything like it .63mm x97mm rimmed case[rim 75mm] .Headstamp P [Polte ?]above f.Abk.K ,3 o clock ,an eagle with a M [Kriegsmarine ] .6 o clock, 1936 ,9 o clock ,VII . Some sort of German Naval practice cartridge ?full length or cut ? any information welcomed ,regards Dave