Quite a few German soldiers had escaped from their POW camp. The most famous story was told in the movie "The great excape" which tells the story of the German officer "Franz von Werra".
Hauptmann Oskar Gögler is famous for a spectacular escape out of the British POW camp "Island Camp". A "Der Landser" magazine was published about his story with 50 pages only about the escape! The article was written by Gögler himself. The magazine title is "O.GÖGLER - ALARM IN ISLAND CAMP". Gögler is shown twice inside the magazine.

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Certificate to the Iron Cross 1st Class issued on 7.3.1943 to Hauptmann Gögler serving with I./Grenadier-Regiment 437. Signed by the division comander. Two holes.
Certificate to the Iron Cross 2nd Class issued on 9.6.1940 to Oberfeldwebel Gögler serving with Infanterie-Pionier-Zug 485. Signed by the division comander. Two holes.
Certificate to the Infantry Assault Badge in silver issued on 31.10.41 to Oberleutnant Gögler serving with Inf.Rgt.485. Signed by the regiment commander. Folded twice. Two holes. It goes with a application form listing 3 assault days as a platoon leader.
Interestingly, there is another certificate to the Infantry Assault Badge issued on 11.12.1941.

An interesting November 1941 dated document ordering 1 Infantry Assault Badge with certificate as well an another 100 blank citations.

Certificate to the Westwall Medal (one corner missing). Certificate to the 4 years Long Service Award. Certificate to the Wound Badge in silver issued in November 1942 for three injuries.
Color certifiate for a shooting badge serving with Infanterie-Reigment 110. A Feldwebel and an Oberfeldwebel and Oberwachtmeister promotion citation.

A 1967 dated document of the Bundesarchiv tells you a lot of details on his service time. He served with the police since 1931 and was promoted a Hauptmann in 1942 for example. 

A "Landser" magazine with 50 pages on his escape!

A photo album with 240 photos documenting his time in war from 1939 until 1945. At the end of the album there are photos taken inside the POW camp he escaped! These photos were also published in the magazine.

A lot additional period time and early postwar documents allowing a lot of room for additional research!

His personal I.R.485 ID tag, his 4 years Long Service Award on bar and his Sport's Badge.