The model is the Heller 1/400 Blücher (obtained from a Prinz Eugen base kit modified with lots of hand made pieces.)
The model shows the Blücher as it looked like on April 8th, 1940 during Operation Weserubung (invasion of Norway by the Germans) when the Blücher was sunk into the Oslo Fjord with Norwegian torpedoes fired by the Oskarsborg fortress close to Droback strait.
I am attaching some photos of the model in progres just to show the main works needed to obtain Blücher from Prinz Eugen.